61993404 has 48 divisors (see below), whose sum is σ = 175338240. Its totient is φ = 18785520.

The previous prime is 61993391. The next prime is 61993417. The reversal of 61993404 is 40439916.

61993404 is a `hidden beast` number, since 619 + 9 + 34 + 0 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (61993391) and next prime (61993417).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24904 + ... + 27279.

It is an arithmetic number, because the mean of its divisors is an integer number (3652880).

Almost surely, 2^61993404 is an apocalyptic number.

It is an amenable number.

61993404 is an abundant number, since it is smaller than the sum of its proper divisors (113344836).

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

61993404 is a wasteful number, since it uses less digits than its factorization.

61993404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52207 (or 52199 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 61993404 is about 7873.5890164524. The cubic root of 61993404 is about 395.7751248504.

The spelling of 61993404 in words is "sixty-one million, nine hundred ninety-three thousand, four hundred four".