79836642 has 12 divisors (see below), whose sum is σ = 172979430. Its totient is φ = 26612208.

The previous prime is 79836637. The next prime is 79836643. The reversal of 79836642 is 24663897.

It can be written as a sum of positive squares in only one way, i.e., 50253921 + 29582721 = 7089^2 + 5439^2 .

It is not an unprimeable number, because it can be changed into a prime (79836643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2217667 + ... + 2217702.

Almost surely, 2^79836642 is an apocalyptic number.

79836642 is an abundant number, since it is smaller than the sum of its proper divisors (93142788).

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

79836642 is a wasteful number, since it uses less digits than its factorization.

79836642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4435377 (or 4435374 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 79836642 is about 8935.1352535930. The cubic root of 79836642 is about 430.5934513664.

The spelling of 79836642 in words is "seventy-nine million, eight hundred thirty-six thousand, six hundred forty-two".