78032775 has 24 divisors (see below), whose sum is σ = 129326544. Its totient is φ = 41516800.

The previous prime is 78032749. The next prime is 78032777. The reversal of 78032775 is 57723087.

It is not a de Polignac number, because 78032775 - 2⁵ = 78032743 is a prime.

It is a super-2 number, since 2×78032775² = 12178227948401250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78032777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38077 + ... + 40073.

It is an arithmetic number, because the mean of its divisors is an integer number (5388606).

Almost surely, 2^78032775 is an apocalyptic number.

78032775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78032775 is a deficient number, since it is larger than the sum of its proper divisors (51293769).

78032775 is a wasteful number, since it uses less digits than its factorization.

78032775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531 (or 2526 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 78032775 is about 8833.6161904398. The cubic root of 78032775 is about 427.3257044000.

The spelling of 78032775 in words is "seventy-eight million, thirty-two thousand, seven hundred seventy-five".