616570640 has 120 divisors (see below), whose sum is σ = 1668851520. Its totient is φ = 207516672.

The previous prime is 616570631. The next prime is 616570657. The reversal of 616570640 is 46075616.

It is a super-2 number, since 2×616570640² = 760318708220019200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 616570640.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4435691 + ... + 4435829.

It is an arithmetic number, because the mean of its divisors is an integer number (13907096).

Almost surely, 2^616570640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616570640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834425760).

616570640 is an abundant number, since it is smaller than the sum of its proper divisors (1052280880).

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

616570640 is a wasteful number, since it uses less digits than its factorization.

616570640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 616570640 is about 24830.8405012799. The cubic root of 616570640 is about 851.1268284780.

The spelling of 616570640 in words is "six hundred sixteen million, five hundred seventy thousand, six hundred forty".