61630072 has 32 divisors (see below), whose sum is σ = 139017600. Its totient is φ = 25022304.

The previous prime is 61630021. The next prime is 61630109. The reversal of 61630072 is 27003616.

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, 27898 + ... + 30025.

It is an arithmetic number, because the mean of its divisors is an integer number (4344300).

Almost surely, 2^61630072 is an apocalyptic number.

It is an amenable number.

61630072 is an abundant number, since it is smaller than the sum of its proper divisors (77387528).

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

61630072 is a wasteful number, since it uses less digits than its factorization.

61630072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57955 (or 57951 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 61630072 is about 7850.4822781788. The cubic root of 61630072 is about 395.0004208723. Note that the first 3 decimals are identical.

Adding to 61630072 its reverse (27003616), we get a palindrome (88633688).

The spelling of 61630072 in words is "sixty-one million, six hundred thirty thousand, seventy-two".