37400561 has 8 divisors (see below), whose sum is σ = 43200864. Its totient is φ = 32000320.

The previous prime is 37400533. The next prime is 37400567. The reversal of 37400561 is 16500473.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-37400561 is a prime.

It is a super-2 number, since 2×37400561² = 2797603926229442, which contains 22 as substring.

It is a Duffinian number.

37400561 is a modest number, since divided by 561 gives 374 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 37400561.

It is not an unprimeable number, because it can be changed into a prime (37400567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99815 + ... + 100188.

It is an arithmetic number, because the mean of its divisors is an integer number (5400108).

Almost surely, 2^37400561 is an apocalyptic number.

It is an amenable number.

37400561 is a deficient number, since it is larger than the sum of its proper divisors (5800303).

37400561 is a wasteful number, since it uses less digits than its factorization.

37400561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200031.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 37400561 is about 6115.5998070508. The cubic root of 37400561 is about 334.4203565107.

The spelling of 37400561 in words is "thirty-seven million, four hundred thousand, five hundred sixty-one".