80694720 has 84 divisors (see below), whose sum is σ = 277566120. Its totient is φ = 21517824.

The previous prime is 80694709. The next prime is 80694737. The reversal of 80694720 is 2749608.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11130 + ... + 16889.

Almost surely, 2^80694720 is an apocalyptic number.

80694720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80694720 is an abundant number, since it is smaller than the sum of its proper divisors (196871400).

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

80694720 is a wasteful number, since it uses less digits than its factorization.

80694720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28042 (or 28029 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 80694720 is about 8983.0239897264. The cubic root of 80694720 is about 432.1306189385.

The spelling of 80694720 in words is "eighty million, six hundred ninety-four thousand, seven hundred twenty".