61589720 has 32 divisors (see below), whose sum is σ = 139600800. Its totient is φ = 24453888.

The previous prime is 61589711. The next prime is 61589747. The reversal of 61589720 is 2798516.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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, 140 + ... + 11099.

It is an arithmetic number, because the mean of its divisors is an integer number (4362525).

Almost surely, 2^61589720 is an apocalyptic number.

It is an amenable number.

61589720 is an abundant number, since it is smaller than the sum of its proper divisors (78011080).

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

61589720 is a wasteful number, since it uses less digits than its factorization.

61589720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11387 (or 11383 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 61589720 is about 7847.9118241734. The cubic root of 61589720 is about 394.9141938276.

The spelling of 61589720 in words is "sixty-one million, five hundred eighty-nine thousand, seven hundred twenty".