78238524 has 48 divisors (see below), whose sum is σ = 224688128. Its totient is φ = 20634048.

The previous prime is 78238493. The next prime is 78238529. The reversal of 78238524 is 42583287.

It is a super-2 number, since 2×78238524² = 12242533275397152, 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 not an unprimeable number, because it can be changed into a prime (78238529) 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, 34732 + ... + 36915.

Almost surely, 2^78238524 is an apocalyptic number.

It is an amenable number.

78238524 is an abundant number, since it is smaller than the sum of its proper divisors (146449604).

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

78238524 is a wasteful number, since it uses less digits than its factorization.

78238524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71674 (or 71672 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 78238524 is about 8845.2543208209. The cubic root of 78238524 is about 427.7009513176.

The spelling of 78238524 in words is "seventy-eight million, two hundred thirty-eight thousand, five hundred twenty-four".