78372075 has 24 divisors (see below), whose sum is σ = 130277376. Its totient is φ = 41572000.

The previous prime is 78372059. The next prime is 78372079. The reversal of 78372075 is 57027387.

It is not a de Polignac number, because 78372075 - 2⁴ = 78372059 is a prime.

It is a super-2 number, since 2×78372075² = 12284364279611250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78372079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11590 + ... + 17060.

It is an arithmetic number, because the mean of its divisors is an integer number (5428224).

Almost surely, 2^78372075 is an apocalyptic number.

78372075 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78372075 is a deficient number, since it is larger than the sum of its proper divisors (51905301).

78372075 is a wasteful number, since it uses less digits than its factorization.

78372075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675 (or 5670 counting only the distinct ones).

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

The square root of 78372075 is about 8852.8004043918. The cubic root of 78372075 is about 427.9441708848.

The spelling of 78372075 in words is "seventy-eight million, three hundred seventy-two thousand, seventy-five".