60809144 has 32 divisors (see below), whose sum is σ = 125971200. Its totient is φ = 27287520.

The previous prime is 60809137. The next prime is 60809149. The reversal of 60809144 is 44190806.

60809144 = 1942² + 1943² + ... + 1957².

It is a self number, because there is not a number n which added to its sum of digits gives 60809144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60809149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2579 + ... + 11325.

It is an arithmetic number, because the mean of its divisors is an integer number (3936600).

Almost surely, 2^60809144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 60809144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62985600).

60809144 is an abundant number, since it is smaller than the sum of its proper divisors (65162056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

60809144 is a wasteful number, since it uses less digits than its factorization.

60809144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843 (or 8839 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 60809144 is about 7798.0218004312. The cubic root of 60809144 is about 393.2387406993.

The spelling of 60809144 in words is "sixty million, eight hundred nine thousand, one hundred forty-four".