1639249900 has 36 divisors (see below), whose sum is σ = 3568677840. Its totient is φ = 653579200.

The previous prime is 1639249847. The next prime is 1639249901. The reversal of 1639249900 is 99429361.

It is not an unprimeable number, because it can be changed into a prime (1639249901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4746 + ... + 57454.

It is an arithmetic number, because the mean of its divisors is an integer number (99129940).

Almost surely, 2^1639249900 is an apocalyptic number.

1639249900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1639249900 is an abundant number, since it is smaller than the sum of its proper divisors (1929427940).

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

1639249900 is a wasteful number, since it uses less digits than its factorization.

1639249900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53034 (or 53027 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 1639249900 is about 40487.6512037930. The cubic root of 1639249900 is about 1179.0938892737.

The spelling of 1639249900 in words is "one billion, six hundred thirty-nine million, two hundred forty-nine thousand, nine hundred".