2389857403920 has 240 divisors, whose sum is σ = 8896123611648. Its totient is φ = 528631971840.

The previous prime is 2389857403891. The next prime is 2389857403979. The reversal of 2389857403920 is 293047589832.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×2389857403920² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2913169 + ... + 3642288.

Almost surely, 2^{2389857403920} is an apocalyptic number.

2389857403920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2389857403920 is an abundant number, since it is smaller than the sum of its proper divisors (6506266207728).

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

2389857403920 is a wasteful number, since it uses less digits than its factorization.

2389857403920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6555518 (or 6555505 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 2389857403920 in words is "two trillion, three hundred eighty-nine billion, eight hundred fifty-seven million, four hundred three thousand, nine hundred twenty".