61290940 has 24 divisors (see below), whose sum is σ = 128912112. Its totient is φ = 24478080.

The previous prime is 61290919. The next prime is 61291003. The reversal of 61290940 is 4909216.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13207 + ... + 17233.

It is an arithmetic number, because the mean of its divisors is an integer number (5371338).

Almost surely, 2^61290940 is an apocalyptic number.

It is an amenable number.

61290940 is an abundant number, since it is smaller than the sum of its proper divisors (67621172).

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

61290940 is a wasteful number, since it uses less digits than its factorization.

61290940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797 (or 4795 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 61290940 is about 7828.8530449869. The cubic root of 61290940 is about 394.2745644770.

The spelling of 61290940 in words is "sixty-one million, two hundred ninety thousand, nine hundred forty".