61624530 has 64 divisors (see below), whose sum is σ = 179280000. Its totient is φ = 14938560.

The previous prime is 61624513. The next prime is 61624561. The reversal of 61624530 is 3542616.

61624530 is a `hidden beast` number, since 6 + 1 + 624 + 5 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 61624494 and 61624503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7405 + ... + 13344.

It is an arithmetic number, because the mean of its divisors is an integer number (2801250).

Almost surely, 2^61624530 is an apocalyptic number.

61624530 is an abundant number, since it is smaller than the sum of its proper divisors (117655470).

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

61624530 is a wasteful number, since it uses less digits than its factorization.

61624530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20776 (or 20770 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 61624530 is about 7850.1292982982. The cubic root of 61624530 is about 394.9885805597.

The spelling of 61624530 in words is "sixty-one million, six hundred twenty-four thousand, five hundred thirty".