1392742080 has 224 divisors, whose sum is σ = 4938247680. Its totient is φ = 369515520.

The previous prime is 1392742073. The next prime is 1392742097. The reversal of 1392742080 is 802472931.

1392742080 is a `hidden beast` number, since 139 + 27 + 420 + 80 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2859597 + ... + 2860083.

Almost surely, 2^1392742080 is an apocalyptic number.

1392742080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392742080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2469123840).

1392742080 is an abundant number, since it is smaller than the sum of its proper divisors (3545505600).

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

1392742080 is a wasteful number, since it uses less digits than its factorization.

1392742080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1392742080 is about 37319.4598031644. The cubic root of 1392742080 is about 1116.7524120192.

The spelling of 1392742080 in words is "one billion, three hundred ninety-two million, seven hundred forty-two thousand, eighty".