1620902984 has 16 divisors (see below), whose sum is σ = 3041185920. Its totient is φ = 809920080.

The previous prime is 1620902981. The next prime is 1620902999. The reversal of 1620902984 is 4892090261.

It is a super-4 number, since 4×1620902984⁴ (a number of 38 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1620902981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53312 + ... + 77999.

It is an arithmetic number, because the mean of its divisors is an integer number (190074120).

Almost surely, 2^1620902984 is an apocalyptic number.

It is an amenable number.

1620902984 is a deficient number, since it is larger than the sum of its proper divisors (1420282936).

1620902984 is a wasteful number, since it uses less digits than its factorization.

1620902984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132860 (or 132856 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1620902984 is about 40260.4394412182. The cubic root of 1620902984 is about 1174.6784655750.

The spelling of 1620902984 in words is "one billion, six hundred twenty million, nine hundred two thousand, nine hundred eighty-four".