1499488640 has 128 divisors (see below), whose sum is σ = 3965613120. Its totient is φ = 538583040.

The previous prime is 1499488637. The next prime is 1499488649. The reversal of 1499488640 is 468849941.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1499488649) 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, 305405 + ... + 310275.

Almost surely, 2^1499488640 is an apocalyptic number.

1499488640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1499488640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1982806560).

1499488640 is an abundant number, since it is smaller than the sum of its proper divisors (2466124480).

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

1499488640 is a wasteful number, since it uses less digits than its factorization.

1499488640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940 (or 4928 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The square root of 1499488640 is about 38723.2312701303. The cubic root of 1499488640 is about 1144.5841475299.

The spelling of 1499488640 in words is "one billion, four hundred ninety-nine million, four hundred eighty-eight thousand, six hundred forty".