1639006368 has 48 divisors (see below), whose sum is σ = 4304474496. Its totient is φ = 546071040.

The previous prime is 1639006337. The next prime is 1639006379. The reversal of 1639006368 is 8636009361.

It is a tau number, because it is divible by the number of its divisors (48).

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, 392580 + ... + 396732.

It is an arithmetic number, because the mean of its divisors is an integer number (89676552).

Almost surely, 2^1639006368 is an apocalyptic number.

It is an amenable number.

1639006368 is an abundant number, since it is smaller than the sum of its proper divisors (2665468128).

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

1639006368 is a wasteful number, since it uses less digits than its factorization.

1639006368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8277 (or 8269 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 1639006368 is about 40484.6436071753. The cubic root of 1639006368 is about 1179.0354964454.

The spelling of 1639006368 in words is "one billion, six hundred thirty-nine million, six thousand, three hundred sixty-eight".