1392266880 has 320 divisors, whose sum is σ = 5038498080. Its totient is φ = 366336000.

The previous prime is 1392266861. The next prime is 1392266929. The reversal of 1392266880 is 886622931.

It is a tau number, because it is divible by the number of its divisors (320).

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5546755 + ... + 5547005.

Almost surely, 2^1392266880 is an apocalyptic number.

1392266880 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 1392266880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2519249040).

1392266880 is an abundant number, since it is smaller than the sum of its proper divisors (3646231200).

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

1392266880 is a wasteful number, since it uses less digits than its factorization.

1392266880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1392266880 is about 37313.0926083593. The cubic root of 1392266880 is about 1116.6253865585.

The spelling of 1392266880 in words is "one billion, three hundred ninety-two million, two hundred sixty-six thousand, eight hundred eighty".