1639494984 has 32 divisors (see below), whose sum is σ = 4185947520. Its totient is φ = 534870336.

The previous prime is 1639494973. The next prime is 1639495001. The reversal of 1639494984 is 4894949361.

It is a super-2 number, since 2×1639494984² = 5375887605122320512, which contains 22 as substring.

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, 725599 + ... + 727854.

It is an arithmetic number, because the mean of its divisors is an integer number (130810860).

Almost surely, 2^1639494984 is an apocalyptic number.

It is an amenable number.

1639494984 is an abundant number, since it is smaller than the sum of its proper divisors (2546452536).

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

1639494984 is a wasteful number, since it uses less digits than its factorization.

1639494984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453509 (or 1453505 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 57.

The square root of 1639494984 is about 40490.6777419198. The cubic root of 1639494984 is about 1179.1526483940.

The spelling of 1639494984 in words is "one billion, six hundred thirty-nine million, four hundred ninety-four thousand, nine hundred eighty-four".