999742464 has 132 divisors (see below), whose sum is σ = 3299338224. Its totient is φ = 285622272.

The previous prime is 999742451. The next prime is 999742487. The reversal of 999742464 is 464247999.

999742464 is a `hidden beast` number, since 99 + 97 + 4 + 2 + 464 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 999742464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56764 + ... + 72260.

Almost surely, 2^999742464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999742464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649669112).

999742464 is an abundant number, since it is smaller than the sum of its proper divisors (2299595760).

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

999742464 is a wasteful number, since it uses less digits than its factorization.

999742464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15530 (or 15509 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 999742464 is about 31618.7043377808. The cubic root of 999742464 is about 999.9141472962.

The spelling of 999742464 in words is "nine hundred ninety-nine million, seven hundred forty-two thousand, four hundred sixty-four".