15401490 has 128 divisors (see below), whose sum is σ = 44416512. Its totient is φ = 3379200.

The previous prime is 15401483. The next prime is 15401497. The reversal of 15401490 is 9410451.

It is an interprime number because it is at equal distance from previous prime (15401483) and next prime (15401497).

It is a self number, because there is not a number n which added to its sum of digits gives 15401490.

It is not an unprimeable number, because it can be changed into a prime (15401497) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 152440 + ... + 152540.

It is an arithmetic number, because the mean of its divisors is an integer number (347004).

Almost surely, 2^15401490 is an apocalyptic number.

15401490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15401490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22208256).

15401490 is an abundant number, since it is smaller than the sum of its proper divisors (29015022).

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

15401490 is a wasteful number, since it uses less digits than its factorization.

15401490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 15401490 is about 3924.4732130568. The cubic root of 15401490 is about 248.8022170961.

The spelling of 15401490 in words is "fifteen million, four hundred one thousand, four hundred ninety".