1690531944 has 64 divisors (see below), whose sum is σ = 4270717440. Its totient is φ = 557618880.

The previous prime is 1690531891. The next prime is 1690531951. The reversal of 1690531944 is 4491350961.

It is a junction number, because it is equal to n+sod(n) for n = 1690531896 and 1690531905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1719277 + ... + 1720259.

It is an arithmetic number, because the mean of its divisors is an integer number (66729960).

Almost surely, 2^1690531944 is an apocalyptic number.

It is an amenable number.

1690531944 is an abundant number, since it is smaller than the sum of its proper divisors (2580185496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1690531944 is a wasteful number, since it uses less digits than its factorization.

1690531944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670 (or 1666 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 1690531944 is about 41116.0788986499. The cubic root of 1690531944 is about 1191.2633862360.

The spelling of 1690531944 in words is "one billion, six hundred ninety million, five hundred thirty-one thousand, nine hundred forty-four".