616123440 has 60 divisors (see below), whose sum is σ = 2069150304. Its totient is φ = 164299392.

The previous prime is 616123439. The next prime is 616123447. The reversal of 616123440 is 44321616.

616123440 is a `hidden beast` number, since 6 + 1 + 612 + 3 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (616123447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 427144 + ... + 428583.

Almost surely, 2^616123440 is an apocalyptic number.

616123440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

616123440 is an abundant number, since it is smaller than the sum of its proper divisors (1453026864).

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

616123440 is a wasteful number, since it uses less digits than its factorization.

616123440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855746 (or 855737 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 616123440 is about 24821.8339370805. The cubic root of 616123440 is about 850.9210040071.

The spelling of 616123440 in words is "six hundred sixteen million, one hundred twenty-three thousand, four hundred forty".