1392417990 has 24 divisors (see below), whose sum is σ = 3620287008. Its totient is φ = 371311440.

The previous prime is 1392417989. The next prime is 1392418037. The reversal of 1392417990 is 997142931.

1392417990 is a `hidden beast` number, since 1 + 392 + 4 + 179 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7735566 + ... + 7735745.

It is an arithmetic number, because the mean of its divisors is an integer number (150845292).

Almost surely, 2^1392417990 is an apocalyptic number.

1392417990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1392417990 is an abundant number, since it is smaller than the sum of its proper divisors (2227869018).

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

1392417990 is a wasteful number, since it uses less digits than its factorization.

1392417990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15471324 (or 15471321 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 1392417990 is about 37315.1174458824. The cubic root of 1392417990 is about 1116.6657828265.

The spelling of 1392417990 in words is "one billion, three hundred ninety-two million, four hundred seventeen thousand, nine hundred ninety".