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74643130 = 257464313
BaseRepresentation
bin1000111001011…
…11011010111010
312012110021010101
410130233122322
5123102040010
611223510014
71564312312
oct434573272
9165407111
1074643130
1139152541
1220bb830a
1312606043
149cb0442
15684673a
hex472f6ba

74643130 has 8 divisors (see below), whose sum is σ = 134357652. Its totient is φ = 29857248.

The previous prime is 74643089. The next prime is 74643131. The reversal of 74643130 is 3134647.

It can be written as a sum of positive squares in 2 ways, for example, as 74321641 + 321489 = 8621^2 + 567^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (74643131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3732147 + ... + 3732166.

Almost surely, 274643130 is an apocalyptic number.

74643130 is a deficient number, since it is larger than the sum of its proper divisors (59714522).

74643130 is a wasteful number, since it uses less digits than its factorization.

74643130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7464320.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 74643130 is about 8639.6255705904. The cubic root of 74643130 is about 421.0463893455.

Adding to 74643130 its reverse (3134647), we get a palindrome (77777777).

It can be divided in two parts, 74 and 643130, that added together give a square (643204 = 8022).

The spelling of 74643130 in words is "seventy-four million, six hundred forty-three thousand, one hundred thirty".

Divisors: 1 2 5 10 7464313 14928626 37321565 74643130