1390426263 has 16 divisors (see below), whose sum is σ = 2083039200. Its totient is φ = 916534080.

The previous prime is 1390426259. The next prime is 1390426319. The reversal of 1390426263 is 3626240931.

1390426263 is a `hidden beast` number, since 1 + 390 + 4 + 2 + 6 + 263 = 666.

It is not a de Polignac number, because 1390426263 - 2² = 1390426259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390426223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286908 + ... + 291713.

It is an arithmetic number, because the mean of its divisors is an integer number (130189950).

Almost surely, 2^1390426263 is an apocalyptic number.

1390426263 is a deficient number, since it is larger than the sum of its proper divisors (692612937).

1390426263 is an equidigital number, since it uses as much as digits as its factorization.

1390426263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578719 (or 578713 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 1390426263 is about 37288.4199584804. The cubic root of 1390426263 is about 1116.1330992254.

The spelling of 1390426263 in words is "one billion, three hundred ninety million, four hundred twenty-six thousand, two hundred sixty-three".