78412824 has 48 divisors (see below), whose sum is σ = 242707920. Its totient is φ = 22403520.

The previous prime is 78412813. The next prime is 78412843. The reversal of 78412824 is 42821487.

It is a super-2 number, since 2×78412824² = 12297141935309952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77287 + ... + 78294.

It is an arithmetic number, because the mean of its divisors is an integer number (5056415).

Almost surely, 2^78412824 is an apocalyptic number.

It is an amenable number.

78412824 is an abundant number, since it is smaller than the sum of its proper divisors (164295096).

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

78412824 is a wasteful number, since it uses less digits than its factorization.

78412824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155600 (or 155593 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 78412824 is about 8855.1015804450. The cubic root of 78412824 is about 428.0183268712.

The spelling of 78412824 in words is "seventy-eight million, four hundred twelve thousand, eight hundred twenty-four".