78615032 has 16 divisors (see below), whose sum is σ = 148565760. Its totient is φ = 38997504.

The previous prime is 78615001. The next prime is 78615037. The reversal of 78615032 is 23051687.

It is a happy number.

It is a super-2 number, since 2×78615032² = 12360646512722048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78615032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78615037) 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, 37673 + ... + 39704.

It is an arithmetic number, because the mean of its divisors is an integer number (9285360).

Almost surely, 2^78615032 is an apocalyptic number.

It is an amenable number.

78615032 is a deficient number, since it is larger than the sum of its proper divisors (69950728).

78615032 is a wasteful number, since it uses less digits than its factorization.

78615032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77510 (or 77506 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 78615032 is about 8866.5118282220. The cubic root of 78615032 is about 428.3859301774.

The spelling of 78615032 in words is "seventy-eight million, six hundred fifteen thousand, thirty-two".