616631072 has 24 divisors (see below), whose sum is σ = 1285404876. Its totient is φ = 290179072.

The previous prime is 616631033. The next prime is 616631129. The reversal of 616631072 is 270136616.

It can be written as a sum of positive squares in 2 ways, for example, as 570445456 + 46185616 = 23884^2 + 6796^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566213 + ... + 567300.

Almost surely, 2^616631072 is an apocalyptic number.

It is an amenable number.

616631072 is an abundant number, since it is smaller than the sum of its proper divisors (668773804).

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

616631072 is a wasteful number, since it uses less digits than its factorization.

616631072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133540 (or 1133532 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 616631072 is about 24832.0573452946. The cubic root of 616631072 is about 851.1546347626.

Adding to 616631072 its reverse (270136616), we get a palindrome (886767688).

The spelling of 616631072 in words is "six hundred sixteen million, six hundred thirty-one thousand, seventy-two".