61894940 has 12 divisors (see below), whose sum is σ = 129979416. Its totient is φ = 24757968.

The previous prime is 61894939. The next prime is 61894979. The reversal of 61894940 is 4949816.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1547354 + ... + 1547393.

It is an arithmetic number, because the mean of its divisors is an integer number (10831618).

Almost surely, 2^61894940 is an apocalyptic number.

It is an amenable number.

61894940 is an abundant number, since it is smaller than the sum of its proper divisors (68084476).

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

61894940 is a wasteful number, since it uses less digits than its factorization.

61894940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094756 (or 3094754 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 61894940 is about 7867.3337287800. Note that the first 3 decimals coincide. The cubic root of 61894940 is about 395.5654775364.

The spelling of 61894940 in words is "sixty-one million, eight hundred ninety-four thousand, nine hundred forty".