1390875220 has 24 divisors (see below), whose sum is σ = 3338100864. Its totient is φ = 476871456.

The previous prime is 1390875209. The next prime is 1390875253. The reversal of 1390875220 is 225780931.

It is a super-2 number, since 2×1390875220² = 3869067755220096800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1390875220.

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, 4967272 + ... + 4967551.

It is an arithmetic number, because the mean of its divisors is an integer number (139087536).

Almost surely, 2^1390875220 is an apocalyptic number.

1390875220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390875220 is an abundant number, since it is smaller than the sum of its proper divisors (1947225644).

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

1390875220 is a wasteful number, since it uses less digits than its factorization.

1390875220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9934839 (or 9934837 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1390875220 is about 37294.4395319195. The cubic root of 1390875220 is about 1116.2532163093.

The spelling of 1390875220 in words is "one billion, three hundred ninety million, eight hundred seventy-five thousand, two hundred twenty".