1380172956 has 12 divisors (see below), whose sum is σ = 3220403592. Its totient is φ = 460057648.

The previous prime is 1380172951. The next prime is 1380172961. The reversal of 1380172956 is 6592710831.

It is an interprime number because it is at equal distance from previous prime (1380172951) and next prime (1380172961).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380172951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57507195 + ... + 57507218.

It is an arithmetic number, because the mean of its divisors is an integer number (268366966).

Almost surely, 2^1380172956 is an apocalyptic number.

It is an amenable number.

1380172956 is an abundant number, since it is smaller than the sum of its proper divisors (1840230636).

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

1380172956 is a wasteful number, since it uses less digits than its factorization.

1380172956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115014420 (or 115014418 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1380172956 is about 37150.6790785848. The cubic root of 1380172956 is about 1113.3827912181.

The spelling of 1380172956 in words is "one billion, three hundred eighty million, one hundred seventy-two thousand, nine hundred fifty-six".