1390880280 has 32 divisors (see below), whose sum is σ = 4172641200. Its totient is φ = 370901376.

The previous prime is 1390880261. The next prime is 1390880327. The reversal of 1390880280 is 820880931.

It is a congruent number.

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, 5795215 + ... + 5795454.

Almost surely, 2^1390880280 is an apocalyptic number.

1390880280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390880280 is an abundant number, since it is smaller than the sum of its proper divisors (2781760920).

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

1390880280 is a wasteful number, since it uses less digits than its factorization.

1390880280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11590683 (or 11590679 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1390880280 is about 37294.5073703890. The cubic root of 1390880280 is about 1116.2545699496.

The spelling of 1390880280 in words is "one billion, three hundred ninety million, eight hundred eighty thousand, two hundred eighty".