78406068 has 72 divisors (see below), whose sum is σ = 203970144. Its totient is φ = 23302080.

The previous prime is 78406051. The next prime is 78406079. The reversal of 78406068 is 86060487.

It is a super-2 number, since 2×78406068² = 12295022998441248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149655 + ... + 150177.

Almost surely, 2^78406068 is an apocalyptic number.

78406068 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78406068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101985072).

78406068 is an abundant number, since it is smaller than the sum of its proper divisors (125564076).

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

78406068 is a wasteful number, since it uses less digits than its factorization.

78406068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 78406068 is about 8854.7200972137. The cubic root of 78406068 is about 428.0060339208.

The spelling of 78406068 in words is "seventy-eight million, four hundred six thousand, sixty-eight".