78462438 has 32 divisors (see below), whose sum is σ = 169223040. Its totient is φ = 24171840.

The previous prime is 78462437. The next prime is 78462443. The reversal of 78462438 is 83426487.

It is a self number, because there is not a number n which added to its sum of digits gives 78462438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78462431) 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, 3720 + ... + 13067.

It is an arithmetic number, because the mean of its divisors is an integer number (5288220).

Almost surely, 2^78462438 is an apocalyptic number.

78462438 is an abundant number, since it is smaller than the sum of its proper divisors (90760602).

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

78462438 is a wasteful number, since it uses less digits than its factorization.

78462438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16852.

The product of its digits is 258048, while the sum is 42.

The square root of 78462438 is about 8857.9025734087. The cubic root of 78462438 is about 428.1085809179.

The spelling of 78462438 in words is "seventy-eight million, four hundred sixty-two thousand, four hundred thirty-eight".