61731404 has 24 divisors (see below), whose sum is σ = 126476448. Its totient is φ = 25810560.

The previous prime is 61731377. The next prime is 61731409. The reversal of 61731404 is 40413716.

It is a super-2 number, since 2×61731404² = 7621532479622432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61731409) 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, 25739 + ... + 28034.

It is an arithmetic number, because the mean of its divisors is an integer number (5269852).

Almost surely, 2^61731404 is an apocalyptic number.

It is an amenable number.

61731404 is an abundant number, since it is smaller than the sum of its proper divisors (64745044).

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

61731404 is a wasteful number, since it uses less digits than its factorization.

61731404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53825 (or 53823 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 61731404 is about 7856.9334985095. The cubic root of 61731404 is about 395.2167885447.

The spelling of 61731404 in words is "sixty-one million, seven hundred thirty-one thousand, four hundred four".