72474820 has 24 divisors (see below), whose sum is σ = 166033728. Its totient is φ = 26354400.

The previous prime is 72474769. The next prime is 72474841. The reversal of 72474820 is 2847427.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164496 + ... + 164935.

It is an arithmetic number, because the mean of its divisors is an integer number (6918072).

Almost surely, 2^72474820 is an apocalyptic number.

It is an amenable number.

72474820 is an abundant number, since it is smaller than the sum of its proper divisors (93558908).

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

72474820 is a wasteful number, since it uses less digits than its factorization.

72474820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329451 (or 329449 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 72474820 is about 8513.2144340431. The cubic root of 72474820 is about 416.9292666420.

The spelling of 72474820 in words is "seventy-two million, four hundred seventy-four thousand, eight hundred twenty".