1240731264 has 64 divisors (see below), whose sum is σ = 3489575040. Its totient is φ = 389246976.

The previous prime is 1240731257. The next prime is 1240731301. The reversal of 1240731264 is 4621370421.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88504 + ... + 101559.

It is an arithmetic number, because the mean of its divisors is an integer number (54524610).

Almost surely, 2^1240731264 is an apocalyptic number.

It is an amenable number.

1240731264 is an abundant number, since it is smaller than the sum of its proper divisors (2248843776).

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

1240731264 is a wasteful number, since it uses less digits than its factorization.

1240731264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190097 (or 190085 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 1240731264 is about 35224.0154440121. The cubic root of 1240731264 is about 1074.5482187415.

The spelling of 1240731264 in words is "one billion, two hundred forty million, seven hundred thirty-one thousand, two hundred sixty-four".