61864044 has 24 divisors (see below), whose sum is σ = 157472448. Its totient is φ = 18746640.

The previous prime is 61864007. The next prime is 61864051. The reversal of 61864044 is 44046816.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 61863996 and 61864014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234202 + ... + 234465.

It is an arithmetic number, because the mean of its divisors is an integer number (6561352).

Almost surely, 2^61864044 is an apocalyptic number.

It is an amenable number.

61864044 is an abundant number, since it is smaller than the sum of its proper divisors (95608404).

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

61864044 is a wasteful number, since it uses less digits than its factorization.

61864044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468685 (or 468683 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 61864044 is about 7865.3699213705. The cubic root of 61864044 is about 395.4996486492.

The spelling of 61864044 in words is "sixty-one million, eight hundred sixty-four thousand, forty-four".