79542490 has 16 divisors (see below), whose sum is σ = 151598952. Its totient is φ = 29945344.

The previous prime is 79542481. The next prime is 79542499. The reversal of 79542490 is 9424597.

It is an interprime number because it is at equal distance from previous prime (79542481) and next prime (79542499).

It can be written as a sum of positive squares in 4 ways, for example, as 76895361 + 2647129 = 8769^2 + 1627^2 .

It is not an unprimeable number, because it can be changed into a prime (79542499) 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, 233779 + ... + 234118.

Almost surely, 2^79542490 is an apocalyptic number.

79542490 is a deficient number, since it is larger than the sum of its proper divisors (72056462).

79542490 is a wasteful number, since it uses less digits than its factorization.

79542490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467921.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 79542490 is about 8918.6596526608. The cubic root of 79542490 is about 430.0639710126.

The spelling of 79542490 in words is "seventy-nine million, five hundred forty-two thousand, four hundred ninety".