61398904 has 32 divisors (see below), whose sum is σ = 131856480. Its totient is φ = 26256384.

The previous prime is 61398901. The next prime is 61398907. The reversal of 61398904 is 40989316.

It is an interprime number because it is at equal distance from previous prime (61398901) and next prime (61398907).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61398901) 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, 33664 + ... + 35440.

It is an arithmetic number, because the mean of its divisors is an integer number (4120515).

Almost surely, 2^61398904 is an apocalyptic number.

It is an amenable number.

61398904 is an abundant number, since it is smaller than the sum of its proper divisors (70457576).

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

61398904 is a wasteful number, since it uses less digits than its factorization.

61398904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 61398904 is about 7835.7452740630. The cubic root of 61398904 is about 394.5059335794.

The spelling of 61398904 in words is "sixty-one million, three hundred ninety-eight thousand, nine hundred four".