1639941324 has 96 divisors (see below), whose sum is σ = 4465047552. Its totient is φ = 458784000.

The previous prime is 1639941313. The next prime is 1639941337. The reversal of 1639941324 is 4231499361.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1388014 + ... + 1389194.

It is an arithmetic number, because the mean of its divisors is an integer number (46510912).

Almost surely, 2^1639941324 is an apocalyptic number.

1639941324 is a gapful number since it is divisible by the number (14) 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 1639941324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2232523776).

1639941324 is an abundant number, since it is smaller than the sum of its proper divisors (2825106228).

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

1639941324 is a wasteful number, since it uses less digits than its factorization.

1639941324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527 (or 1525 counting only the distinct ones).

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

The square root of 1639941324 is about 40496.1890058805. The cubic root of 1639941324 is about 1179.2596437889.

The spelling of 1639941324 in words is "one billion, six hundred thirty-nine million, nine hundred forty-one thousand, three hundred twenty-four".