1499439720 has 64 divisors (see below), whose sum is σ = 4735080000. Its totient is φ = 378805248.

The previous prime is 1499439709. The next prime is 1499439803. The reversal of 1499439720 is 279349941.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1499439720.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326545 + ... + 331104.

It is an arithmetic number, because the mean of its divisors is an integer number (73985625).

Almost surely, 2^1499439720 is an apocalyptic number.

1499439720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1499439720 is an abundant number, since it is smaller than the sum of its proper divisors (3235640280).

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

1499439720 is a wasteful number, since it uses less digits than its factorization.

1499439720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657682 (or 657678 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 1499439720 is about 38722.5996028159. The cubic root of 1499439720 is about 1144.5717002498.

The spelling of 1499439720 in words is "one billion, four hundred ninety-nine million, four hundred thirty-nine thousand, seven hundred twenty".