1390913280 has 108 divisors (see below), whose sum is σ = 4812454920. Its totient is φ = 370907136.

The previous prime is 1390913273. The next prime is 1390913281. The reversal of 1390913280 is 823190931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390913281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48850 + ... + 71889.

Almost surely, 2^1390913280 is an apocalyptic number.

1390913280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390913280 is an abundant number, since it is smaller than the sum of its proper divisors (3421541640).

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

1390913280 is a wasteful number, since it uses less digits than its factorization.

1390913280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120766 (or 120749 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1390913280 is about 37294.9497921635. The cubic root of 1390913280 is about 1116.2633979583.

The spelling of 1390913280 in words is "one billion, three hundred ninety million, nine hundred thirteen thousand, two hundred eighty".