1990500970 has 16 divisors (see below), whose sum is σ = 3584271240. Its totient is φ = 795896064.

The previous prime is 1990500929. The next prime is 1990500973. The reversal of 1990500970 is 790050991.

It can be written as a sum of positive squares in 4 ways, for example, as 1527949921 + 462551049 = 39089^2 + 21507^2 .

It is a super-2 number, since 2×1990500970² = 7924188223141881800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990500973) 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, 9555 + ... + 63814.

Almost surely, 2^1990500970 is an apocalyptic number.

1990500970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1990500970 is a deficient number, since it is larger than the sum of its proper divisors (1593770270).

1990500970 is a wasteful number, since it uses less digits than its factorization.

1990500970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76089.

The product of its (nonzero) digits is 25515, while the sum is 40.

The square root of 1990500970 is about 44615.0307631856. The cubic root of 1990500970 is about 1257.9232123204.

The spelling of 1990500970 in words is "one billion, nine hundred ninety million, five hundred thousand, nine hundred seventy".