78250920 has 64 divisors (see below), whose sum is σ = 256098240. Its totient is φ = 18969600.

The previous prime is 78250901. The next prime is 78250937. The reversal of 78250920 is 2905287.

It is a super-2 number, since 2×78250920² = 12246412961692800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28321 + ... + 30960.

It is an arithmetic number, because the mean of its divisors is an integer number (4001535).

Almost surely, 2^78250920 is an apocalyptic number.

It is an amenable number.

78250920 is an abundant number, since it is smaller than the sum of its proper divisors (177847320).

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

78250920 is a wasteful number, since it uses less digits than its factorization.

78250920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59306 (or 59302 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 78250920 is about 8845.9550077988. The cubic root of 78250920 is about 427.7235382340.

The spelling of 78250920 in words is "seventy-eight million, two hundred fifty thousand, nine hundred twenty".