1690372444 has 12 divisors (see below), whose sum is σ = 2960473600. Its totient is φ = 844522848.

The previous prime is 1690372427. The next prime is 1690372483. The reversal of 1690372444 is 4442730961.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1690372397 and 1690372406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160089 + ... + 170320.

Almost surely, 2^1690372444 is an apocalyptic number.

It is an amenable number.

1690372444 is a deficient number, since it is larger than the sum of its proper divisors (1270101156).

1690372444 is a wasteful number, since it uses less digits than its factorization.

1690372444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331692 (or 331690 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 1690372444 is about 41114.1392224135. The cubic root of 1690372444 is about 1191.2259202209.

The spelling of 1690372444 in words is "one billion, six hundred ninety million, three hundred seventy-two thousand, four hundred forty-four".