1390670 has 8 divisors (see below), whose sum is σ = 2503224. Its totient is φ = 556264.

The previous prime is 1390643. The next prime is 1390681. The reversal of 1390670 is 760931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

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, 69524 + ... + 69543.

It is an arithmetic number, because the mean of its divisors is an integer number (312903).

2^1390670 is an apocalyptic number.

1390670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390670 is a deficient number, since it is larger than the sum of its proper divisors (1112554).

1390670 is a wasteful number, since it uses less digits than its factorization.

1390670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139074.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 1390670 is about 1179.2667213146. The cubic root of 1390670 is about 111.6198313528.

The spelling of 1390670 in words is "one million, three hundred ninety thousand, six hundred seventy".