78940672 has 20 divisors (see below), whose sum is σ = 157728186. Its totient is φ = 39470080.

The previous prime is 78940627. The next prime is 78940679. The reversal of 78940672 is 27604987.

It can be written as a sum of positive squares in only one way, i.e., 77721856 + 1218816 = 8816^2 + 1104^2 .

It is a super-3 number, since 3×78940672³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (78940679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76579 + ... + 77602.

Almost surely, 2^78940672 is an apocalyptic number.

It is an amenable number.

78940672 is a deficient number, since it is larger than the sum of its proper divisors (78787514).

78940672 is an equidigital number, since it uses as much as digits as its factorization.

78940672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154199 (or 154183 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 78940672 is about 8884.8563297332. The cubic root of 78940672 is about 428.9766035748.

The spelling of 78940672 in words is "seventy-eight million, nine hundred forty thousand, six hundred seventy-two".