1620984902 has 16 divisors (see below), whose sum is σ = 2440458720. Its totient is φ = 807505152.

The previous prime is 1620984817. The next prime is 1620984917. The reversal of 1620984902 is 2094890261.

It is a self number, because there is not a number n which added to its sum of digits gives 1620984902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857174 + ... + 859062.

It is an arithmetic number, because the mean of its divisors is an integer number (152528670).

Almost surely, 2^1620984902 is an apocalyptic number.

1620984902 is a deficient number, since it is larger than the sum of its proper divisors (819473818).

1620984902 is a wasteful number, since it uses less digits than its factorization.

1620984902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247.

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

The square root of 1620984902 is about 40261.4567794063. The cubic root of 1620984902 is about 1174.6982540695.

The spelling of 1620984902 in words is "one billion, six hundred twenty million, nine hundred eighty-four thousand, nine hundred two".