61437872 has 20 divisors (see below), whose sum is σ = 119159040. Its totient is φ = 30687168.

The previous prime is 61437869. The next prime is 61437917. The reversal of 61437872 is 27873416.

It is a super-2 number, since 2×61437872² = 7549224231776768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25454 + ... + 27762.

It is an arithmetic number, because the mean of its divisors is an integer number (5957952).

Almost surely, 2^61437872 is an apocalyptic number.

It is an amenable number.

61437872 is a deficient number, since it is larger than the sum of its proper divisors (57721168).

61437872 is a wasteful number, since it uses less digits than its factorization.

61437872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980 (or 3974 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 61437872 is about 7838.2314331742. The cubic root of 61437872 is about 394.5893761985.

The spelling of 61437872 in words is "sixty-one million, four hundred thirty-seven thousand, eight hundred seventy-two".