78372132 has 24 divisors (see below), whose sum is σ = 190819776. Its totient is φ = 24988128.

The previous prime is 78372127. The next prime is 78372137. The reversal of 78372132 is 23127387.

It is an interprime number because it is at equal distance from previous prime (78372127) and next prime (78372137).

It is a super-2 number, since 2×78372132² = 12284382148450848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78372093 and 78372102.

It is not an unprimeable number, because it can be changed into a prime (78372137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141703 + ... + 142254.

It is an arithmetic number, because the mean of its divisors is an integer number (7950824).

Almost surely, 2^78372132 is an apocalyptic number.

It is an amenable number.

78372132 is an abundant number, since it is smaller than the sum of its proper divisors (112447644).

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

78372132 is a wasteful number, since it uses less digits than its factorization.

78372132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283987 (or 283985 counting only the distinct ones).

The product of its digits is 14112, while the sum is 33.

The square root of 78372132 is about 8852.8036237115. The cubic root of 78372132 is about 427.9442746327.

The spelling of 78372132 in words is "seventy-eight million, three hundred seventy-two thousand, one hundred thirty-two".