15491406 has 32 divisors (see below), whose sum is σ = 35762688. Its totient is φ = 4381920.

The previous prime is 15491401. The next prime is 15491447. The reversal of 15491406 is 60419451.

It is a happy number.

15491406 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15491401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2536 + ... + 6116.

It is an arithmetic number, because the mean of its divisors is an integer number (1117584).

Almost surely, 2^15491406 is an apocalyptic number.

15491406 is an abundant number, since it is smaller than the sum of its proper divisors (20271282).

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

15491406 is a wasteful number, since it uses less digits than its factorization.

15491406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 15491406 is about 3935.9123465850. The cubic root of 15491406 is about 249.2854583332.

The spelling of 15491406 in words is "fifteen million, four hundred ninety-one thousand, four hundred six".