78274732 has 24 divisors (see below), whose sum is σ = 146546064. Its totient is φ = 36452352.

The previous prime is 78274667. The next prime is 78274739. The reversal of 78274732 is 23747287.

It is a super-2 number, since 2×78274732² = 12253867339343648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78274739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663 + ... + 12529.

It is an arithmetic number, because the mean of its divisors is an integer number (6106086).

Almost surely, 2^78274732 is an apocalyptic number.

It is an amenable number.

78274732 is a deficient number, since it is larger than the sum of its proper divisors (68271332).

78274732 is a wasteful number, since it uses less digits than its factorization.

78274732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11985 (or 11983 counting only the distinct ones).

The product of its digits is 131712, while the sum is 40.

The square root of 78274732 is about 8847.3008313270. The cubic root of 78274732 is about 427.7669197047.

The spelling of 78274732 in words is "seventy-eight million, two hundred seventy-four thousand, seven hundred thirty-two".