78155260 has 48 divisors (see below), whose sum is σ = 167832000. Its totient is φ = 30564864.

The previous prime is 78155249. The next prime is 78155269. The reversal of 78155260 is 6255187.

It is a super-2 number, since 2×78155260² = 12216489331335200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78155269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290406 + ... + 290674.

It is an arithmetic number, because the mean of its divisors is an integer number (3496500).

Almost surely, 2^78155260 is an apocalyptic number.

It is an amenable number.

78155260 is an abundant number, since it is smaller than the sum of its proper divisors (89676740).

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

78155260 is a wasteful number, since it uses less digits than its factorization.

78155260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 78155260 is about 8840.5463632063. The cubic root of 78155260 is about 427.5491730083.

The spelling of 78155260 in words is "seventy-eight million, one hundred fifty-five thousand, two hundred sixty".