1616722988 has 24 divisors (see below), whose sum is σ = 2914516080. Its totient is φ = 784225280.

The previous prime is 1616722981. The next prime is 1616722993. The reversal of 1616722988 is 8892276161.

It is a super-2 number, since 2×1616722988² = 5227586439855296288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616722981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1820 + ... + 56892.

It is an arithmetic number, because the mean of its divisors is an integer number (121438170).

Almost surely, 2^1616722988 is an apocalyptic number.

It is an amenable number.

1616722988 is a deficient number, since it is larger than the sum of its proper divisors (1297793092).

1616722988 is a wasteful number, since it uses less digits than its factorization.

1616722988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55297 (or 55295 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 1616722988 is about 40208.4939782629. The cubic root of 1616722988 is about 1173.6678399811.

The spelling of 1616722988 in words is "one billion, six hundred sixteen million, seven hundred twenty-two thousand, nine hundred eighty-eight".