1390672 has 20 divisors (see below), whose sum is σ = 2812320. Its totient is φ = 664928.

The previous prime is 1390643. The next prime is 1390681. The reversal of 1390672 is 2760931.

It is a super-3 number, since 3×1390672³ = 8068547991026233344, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1390672.

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, 1522 + ... + 2257.

It is an arithmetic number, because the mean of its divisors is an integer number (140616).

2^1390672 is an apocalyptic number.

It is an amenable number.

1390672 is an abundant number, since it is smaller than the sum of its proper divisors (1421648).

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

1390672 is a wasteful number, since it uses less digits than its factorization.

1390672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810 (or 3804 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1390672 is about 1179.2675692988. The cubic root of 1390672 is about 111.6198848617.

The spelling of 1390672 in words is "one million, three hundred ninety thousand, six hundred seventy-two".