78255942 has 16 divisors (see below), whose sum is σ = 156710640. Its totient is φ = 26052192.

The previous prime is 78255937. The next prime is 78255943. The reversal of 78255942 is 24955287.

It is a super-2 number, since 2×78255942² = 12247984916614728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78255894 and 78255903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78255943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2893 + ... + 12840.

It is an arithmetic number, because the mean of its divisors is an integer number (9794415).

Almost surely, 2^78255942 is an apocalyptic number.

78255942 is an abundant number, since it is smaller than the sum of its proper divisors (78454698).

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

78255942 is a wasteful number, since it uses less digits than its factorization.

78255942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16567.

The product of its digits is 201600, while the sum is 42.

The square root of 78255942 is about 8846.2388617988. The cubic root of 78255942 is about 427.7326882081.

It can be divided in two parts, 78255 and 942, that added together give a palindrome (79197).

The spelling of 78255942 in words is "seventy-eight million, two hundred fifty-five thousand, nine hundred forty-two".