80690644 has 48 divisors (see below), whose sum is σ = 158860800. Its totient is φ = 35683200.

The previous prime is 80690641. The next prime is 80690657. The reversal of 80690644 is 44609608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80690641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67734 + ... + 68914.

It is an arithmetic number, because the mean of its divisors is an integer number (3309600).

Almost surely, 2^80690644 is an apocalyptic number.

It is an amenable number.

80690644 is a deficient number, since it is larger than the sum of its proper divisors (78170156).

80690644 is a wasteful number, since it uses less digits than its factorization.

80690644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264 (or 1262 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 80690644 is about 8982.7971144850. The cubic root of 80690644 is about 432.1233429810.

The spelling of 80690644 in words is "eighty million, six hundred ninety thousand, six hundred forty-four".