1264398402 has 32 divisors (see below), whose sum is σ = 2600845632. Its totient is φ = 409558464.

The previous prime is 1264398383. The next prime is 1264398407. The reversal of 1264398402 is 2048934621.

It is not an unprimeable number, because it can be changed into a prime (1264398407) 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 15 ways as a sum of consecutive naturals, for example, 38388 + ... + 63264.

It is an arithmetic number, because the mean of its divisors is an integer number (81276426).

Almost surely, 2^1264398402 is an apocalyptic number.

1264398402 is an abundant number, since it is smaller than the sum of its proper divisors (1336447230).

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

1264398402 is a wasteful number, since it uses less digits than its factorization.

1264398402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25122.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1264398402 is about 35558.3801937040. The cubic root of 1264398402 is about 1081.3376207430.

The spelling of 1264398402 in words is "one billion, two hundred sixty-four million, three hundred ninety-eight thousand, four hundred two".