1599939640 has 32 divisors (see below), whose sum is σ = 3876778080. Its totient is φ = 590746752.

The previous prime is 1599939617. The next prime is 1599939641. The reversal of 1599939640 is 469399951.

It is a super-4 number, since 4×1599939640⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1599939641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1537884 + ... + 1538923.

It is an arithmetic number, because the mean of its divisors is an integer number (121149315).

Almost surely, 2^1599939640 is an apocalyptic number.

1599939640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1599939640 is an abundant number, since it is smaller than the sum of its proper divisors (2276838440).

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

1599939640 is a wasteful number, since it uses less digits than its factorization.

1599939640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076831 (or 3076827 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 55.

The square root of 1599939640 is about 39999.2454928840. The cubic root of 1599939640 is about 1169.5923872910.

The spelling of 1599939640 in words is "one billion, five hundred ninety-nine million, nine hundred thirty-nine thousand, six hundred forty".