1390420715 has 8 divisors (see below), whose sum is σ = 1669837680. Its totient is φ = 1111448032.

The previous prime is 1390420687. The next prime is 1390420723. The reversal of 1390420715 is 5170240931.

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

It is a cyclic number.

It is not a de Polignac number, because 1390420715 - 2⁶ = 1390420651 is a prime.

It is a super-2 number, since 2×1390420715² = 3866539529402222450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104144 + ... + 116733.

It is an arithmetic number, because the mean of its divisors is an integer number (208729710).

Almost surely, 2^1390420715 is an apocalyptic number.

1390420715 is a deficient number, since it is larger than the sum of its proper divisors (279416965).

1390420715 is a wasteful number, since it uses less digits than its factorization.

1390420715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222141.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1390420715 is about 37288.3455653372. The cubic root of 1390420715 is about 1116.1316147131.

The spelling of 1390420715 in words is "one billion, three hundred ninety million, four hundred twenty thousand, seven hundred fifteen".