1320399262 has 64 divisors (see below), whose sum is σ = 2577254400. Its totient is φ = 492687360.

The previous prime is 1320399251. The next prime is 1320399263. The reversal of 1320399262 is 2629930231.

It is a super-2 number, since 2×1320399262² = 3486908422180289288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320399263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 936414 + ... + 937822.

It is an arithmetic number, because the mean of its divisors is an integer number (40269600).

Almost surely, 2^1320399262 is an apocalyptic number.

1320399262 is a deficient number, since it is larger than the sum of its proper divisors (1256855138).

1320399262 is a wasteful number, since it uses less digits than its factorization.

1320399262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 1320399262 is about 36337.2984961733. The cubic root of 1320399262 is about 1097.0718990764.

The spelling of 1320399262 in words is "one billion, three hundred twenty million, three hundred ninety-nine thousand, two hundred sixty-two".