1690670252 has 24 divisors (see below), whose sum is σ = 3020371200. Its totient is φ = 827817296.

The previous prime is 1690670251. The next prime is 1690670297. The reversal of 1690670252 is 2520760961.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1690670251) 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, 48449 + ... + 75687.

It is an arithmetic number, because the mean of its divisors is an integer number (125848800).

Almost surely, 2^1690670252 is an apocalyptic number.

It is an amenable number.

1690670252 is a deficient number, since it is larger than the sum of its proper divisors (1329700948).

1690670252 is a wasteful number, since it uses less digits than its factorization.

1690670252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27565 (or 27563 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1690670252 is about 41117.7607853346. The cubic root of 1690670252 is about 1191.2958724137.

The spelling of 1690670252 in words is "one billion, six hundred ninety million, six hundred seventy thousand, two hundred fifty-two".