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64143470 = 2540915683
BaseRepresentation
bin1111010010110…
…0000001101110
311110200211022002
43310230001232
5112410042340
610210452302
71406132126
oct364540156
9143624262
1064143470
1133230a36
1219594092
131039ac21
148739c86
155970715
hex3d2c06e

64143470 has 16 divisors (see below), whose sum is σ = 115747920. Its totient is φ = 25593024.

The previous prime is 64143467. The next prime is 64143473. The reversal of 64143470 is 7434146.

64143470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64143467) and next prime (64143473).

It is a super-2 number, since 2×641434702 = 8228769487281800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64143473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3752 + ... + 11931.

It is an arithmetic number, because the mean of its divisors is an integer number (7234245).

Almost surely, 264143470 is an apocalyptic number.

64143470 is a deficient number, since it is larger than the sum of its proper divisors (51604450).

64143470 is a wasteful number, since it uses less digits than its factorization.

64143470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16099.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 64143470 is about 8008.9618553218. The cubic root of 64143470 is about 400.2986727643.

The spelling of 64143470 in words is "sixty-four million, one hundred forty-three thousand, four hundred seventy".

Divisors: 1 2 5 10 409 818 2045 4090 15683 31366 78415 156830 6414347 12828694 32071735 64143470