15890424420 has 72 divisors (see below), whose sum is σ = 48179045376. Its totient is φ = 3911486592.

The previous prime is 15890424397. The next prime is 15890424443. The reversal of 15890424420 is 2442409851.

It is an interprime number because it is at equal distance from previous prime (15890424397) and next prime (15890424443).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 773412 + ... + 793691.

It is an arithmetic number, because the mean of its divisors is an integer number (669153408).

Almost surely, 2^15890424420 is an apocalyptic number.

15890424420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15890424420 is an abundant number, since it is smaller than the sum of its proper divisors (32288620956).

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

15890424420 is a wasteful number, since it uses less digits than its factorization.

15890424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567141 (or 1567126 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 15890424420 in words is "fifteen billion, eight hundred ninety million, four hundred twenty-four thousand, four hundred twenty".