80620815 has 16 divisors (see below), whose sum is σ = 140720256. Its totient is φ = 39088800.

The previous prime is 80620811. The next prime is 80620849. The reversal of 80620815 is 51802608.

It is not a de Polignac number, because 80620815 - 2² = 80620811 is a prime.

It is a super-2 number, since 2×80620815² = 12999431622528450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80620811) 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, 244141 + ... + 244470.

It is an arithmetic number, because the mean of its divisors is an integer number (8795016).

Almost surely, 2^80620815 is an apocalyptic number.

80620815 is a deficient number, since it is larger than the sum of its proper divisors (60099441).

80620815 is a wasteful number, since it uses less digits than its factorization.

80620815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488630.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 80620815 is about 8978.9094549394. The cubic root of 80620815 is about 431.9986550455.

The spelling of 80620815 in words is "eighty million, six hundred twenty thousand, eight hundred fifteen".