15994494 has 24 divisors (see below), whose sum is σ = 34732152. Its totient is φ = 5319600.

The previous prime is 15994493. The next prime is 15994529. The reversal of 15994494 is 49449951.

15994494 is a `hidden beast` number, since 159 + 9 + 4 + 494 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15994493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11644 + ... + 12944.

It is an arithmetic number, because the mean of its divisors is an integer number (1447173).

Almost surely, 2^15994494 is an apocalyptic number.

15994494 is an abundant number, since it is smaller than the sum of its proper divisors (18737658).

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

15994494 is a wasteful number, since it uses less digits than its factorization.

15994494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992 (or 1989 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 15994494 is about 3999.3116907788. The cubic root of 15994494 is about 251.9553019740.

The spelling of 15994494 in words is "fifteen million, nine hundred ninety-four thousand, four hundred ninety-four".