616431304 has 8 divisors (see below), whose sum is σ = 1155808710. Its totient is φ = 308215648.

The previous prime is 616431259. The next prime is 616431313. The reversal of 616431304 is 403134616.

It can be written as a sum of positive squares in only one way, i.e., 400400100 + 216031204 = 20010^2 + 14698^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×616431304² = 759975105102280832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38526949 + ... + 38526964.

Almost surely, 2^616431304 is an apocalyptic number.

It is an amenable number.

616431304 is a deficient number, since it is larger than the sum of its proper divisors (539377406).

616431304 is a wasteful number, since it uses less digits than its factorization.

616431304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77053919 (or 77053915 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 616431304 is about 24828.0346382874. The cubic root of 616431304 is about 851.0627095517.

The spelling of 616431304 in words is "six hundred sixteen million, four hundred thirty-one thousand, three hundred four".