78156408 has 32 divisors (see below), whose sum is σ = 213154560. Its totient is φ = 23683680.

The previous prime is 78156391. The next prime is 78156409. The reversal of 78156408 is 80465187.

It is a super-2 number, since 2×78156408² = 12216848222924928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78156409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147760 + ... + 148287.

It is an arithmetic number, because the mean of its divisors is an integer number (6661080).

Almost surely, 2^78156408 is an apocalyptic number.

It is an amenable number.

78156408 is an abundant number, since it is smaller than the sum of its proper divisors (134998152).

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

78156408 is a wasteful number, since it uses less digits than its factorization.

78156408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296067 (or 296063 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 78156408 is about 8840.6112910816. The cubic root of 78156408 is about 427.5512663801.

The spelling of 78156408 in words is "seventy-eight million, one hundred fifty-six thousand, four hundred eight".