815667040 has 48 divisors (see below), whose sum is σ = 1989187200. Its totient is φ = 315740160.

The previous prime is 815667037. The next prime is 815667053. The reversal of 815667040 is 40766518.

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 7 ways as a sum of consecutive naturals, for example, 77265 + ... + 87184.

It is an arithmetic number, because the mean of its divisors is an integer number (41441400).

Almost surely, 2^815667040 is an apocalyptic number.

815667040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

815667040 is an abundant number, since it is smaller than the sum of its proper divisors (1173520160).

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

815667040 is a wasteful number, since it uses less digits than its factorization.

815667040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164495 (or 164487 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 815667040 is about 28559.8851538307. The cubic root of 815667040 is about 934.3386288233.

The spelling of 815667040 in words is "eight hundred fifteen million, six hundred sixty-seven thousand, forty".