1990056902 has 16 divisors (see below), whose sum is σ = 3042522000. Its totient is φ = 975959040.

The previous prime is 1990056857. The next prime is 1990056911. The reversal of 1990056902 is 2096500991.

It is a self number, because there is not a number n which added to its sum of digits gives 1990056902.

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, 34202 + ... + 71762.

It is an arithmetic number, because the mean of its divisors is an integer number (190157625).

Almost surely, 2^1990056902 is an apocalyptic number.

1990056902 is a deficient number, since it is larger than the sum of its proper divisors (1052465098).

1990056902 is a wasteful number, since it uses less digits than its factorization.

1990056902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38071.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 1990056902 is about 44610.0538219805. The cubic root of 1990056902 is about 1257.8296604961.

The spelling of 1990056902 in words is "one billion, nine hundred ninety million, fifty-six thousand, nine hundred two".