78032870 has 16 divisors (see below), whose sum is σ = 140706720. Its totient is φ = 31158144.

The previous prime is 78032837. The next prime is 78032879. The reversal of 78032870 is 7823087.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78032870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78032879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650 + ... + 12509.

It is an arithmetic number, because the mean of its divisors is an integer number (8794170).

Almost surely, 2^78032870 is an apocalyptic number.

78032870 is a deficient number, since it is larger than the sum of its proper divisors (62673850).

78032870 is a wasteful number, since it uses less digits than its factorization.

78032870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13759.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 78032870 is about 8833.6215676245. The cubic root of 78032870 is about 427.3258778140.

The spelling of 78032870 in words is "seventy-eight million, thirty-two thousand, eight hundred seventy".