80720154 has 24 divisors (see below), whose sum is σ = 176073300. Its totient is φ = 26725248.

The previous prime is 80720153. The next prime is 80720177. The reversal of 80720154 is 45102708.

It can be written as a sum of positive squares in 2 ways, for example, as 58110129 + 22610025 = 7623^2 + 4755^2 .

It is not an unprimeable number, because it can be changed into a prime (80720153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12367 + ... + 17730.

Almost surely, 2^80720154 is an apocalyptic number.

80720154 is an abundant number, since it is smaller than the sum of its proper divisors (95353146).

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

80720154 is a wasteful number, since it uses less digits than its factorization.

80720154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30254 (or 30251 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 80720154 is about 8984.4395484638. The cubic root of 80720154 is about 432.1760149513.

The spelling of 80720154 in words is "eighty million, seven hundred twenty thousand, one hundred fifty-four".