15994480 has 20 divisors (see below), whose sum is σ = 37187352. Its totient is φ = 6397760.

The previous prime is 15994477. The next prime is 15994483. The reversal of 15994480 is 8449951.

It is an interprime number because it is at equal distance from previous prime (15994477) and next prime (15994483).

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15994483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99886 + ... + 100045.

Almost surely, 2^15994480 is an apocalyptic number.

15994480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15994480 is an abundant number, since it is smaller than the sum of its proper divisors (21192872).

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

15994480 is a wasteful number, since it uses less digits than its factorization.

15994480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199944 (or 199938 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 15994480 is about 3999.3099404772. The cubic root of 15994480 is about 251.9552284617.

The spelling of 15994480 in words is "fifteen million, nine hundred ninety-four thousand, four hundred eighty".