61308740 has 24 divisors (see below), whose sum is σ = 130381440. Its totient is φ = 24212448.

The previous prime is 61308679. The next prime is 61308761. The reversal of 61308740 is 4780316.

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, 17822 + ... + 20981.

It is an arithmetic number, because the mean of its divisors is an integer number (5432560).

Almost surely, 2^61308740 is an apocalyptic number.

It is an amenable number.

61308740 is an abundant number, since it is smaller than the sum of its proper divisors (69072700).

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

61308740 is a wasteful number, since it uses less digits than its factorization.

61308740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38891 (or 38889 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 61308740 is about 7829.9897828797. The cubic root of 61308740 is about 394.3127289429.

The spelling of 61308740 in words is "sixty-one million, three hundred eight thousand, seven hundred forty".