1390900755 has 32 divisors (see below), whose sum is σ = 2333770560. Its totient is φ = 706406400.

The previous prime is 1390900739. The next prime is 1390900759. The reversal of 1390900755 is 5570090931.

It is not a de Polignac number, because 1390900755 - 2⁴ = 1390900739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1390900759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9855 + ... + 53655.

It is an arithmetic number, because the mean of its divisors is an integer number (72930330).

Almost surely, 2^1390900755 is an apocalyptic number.

1390900755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1390900755 is a deficient number, since it is larger than the sum of its proper divisors (942869805).

1390900755 is a wasteful number, since it uses less digits than its factorization.

1390900755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43911.

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 1390900755 is about 37294.7818736080. The cubic root of 1390900755 is about 1116.2600473442.

The spelling of 1390900755 in words is "one billion, three hundred ninety million, nine hundred thousand, seven hundred fifty-five".