80749020 has 48 divisors (see below), whose sum is σ = 246653568. Its totient is φ = 19575360.

The previous prime is 80749007. The next prime is 80749027. The reversal of 80749020 is 2094708.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80749027) 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 15 ways as a sum of consecutive naturals, for example, 60514 + ... + 61833.

It is an arithmetic number, because the mean of its divisors is an integer number (5138616).

Almost surely, 2^80749020 is an apocalyptic number.

It is an amenable number.

80749020 is an abundant number, since it is smaller than the sum of its proper divisors (165904548).

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

80749020 is a wasteful number, since it uses less digits than its factorization.

80749020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122370 (or 122368 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 80749020 is about 8986.0458489816. The cubic root of 80749020 is about 432.2275250367.

The spelling of 80749020 in words is "eighty million, seven hundred forty-nine thousand, twenty".