3999293620 has 24 divisors (see below), whose sum is σ = 9598305024. Its totient is φ = 1371186336.

The previous prime is 3999293593. The next prime is 3999293621. The reversal of 3999293620 is 263929993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999293621) 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, 14283052 + ... + 14283331.

It is an arithmetic number, because the mean of its divisors is an integer number (399929376).

Almost surely, 2^3999293620 is an apocalyptic number.

It is an amenable number.

3999293620 is an abundant number, since it is smaller than the sum of its proper divisors (5599011404).

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

3999293620 is a wasteful number, since it uses less digits than its factorization.

3999293620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28566399 (or 28566397 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 52.

The square root of 3999293620 is about 63239.9685325665. The cubic root of 3999293620 is about 1587.3076041043.

The spelling of 3999293620 in words is "three billion, nine hundred ninety-nine million, two hundred ninety-three thousand, six hundred twenty".