78265408 has 56 divisors (see below), whose sum is σ = 176093120. Its totient is φ = 34214400.

The previous prime is 78265349. The next prime is 78265441. The reversal of 78265408 is 80456287.

It is a super-2 number, since 2×78265408² = 12250948178812928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13333 + ... + 18283.

It is an arithmetic number, because the mean of its divisors is an integer number (3144520).

Almost surely, 2^78265408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78265408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88046560).

78265408 is an abundant number, since it is smaller than the sum of its proper divisors (97827712).

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

78265408 is a wasteful number, since it uses less digits than its factorization.

78265408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995 (or 4985 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 78265408 is about 8846.7738752610. The cubic root of 78265408 is about 427.7499339885.

The spelling of 78265408 in words is "seventy-eight million, two hundred sixty-five thousand, four hundred eight".