15890401 has 4 divisors (see below), whose sum is σ = 16581312. Its totient is φ = 15199492.

The previous prime is 15890389. The next prime is 15890423. The reversal of 15890401 is 10409851.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15890401 - 2⁹ = 15889889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15890401.

It is not an unprimeable number, because it can be changed into a prime (15890491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345421 + ... + 345466.

It is an arithmetic number, because the mean of its divisors is an integer number (4145328).

Almost surely, 2^15890401 is an apocalyptic number.

It is an amenable number.

15890401 is a deficient number, since it is larger than the sum of its proper divisors (690911).

15890401 is an equidigital number, since it uses as much as digits as its factorization.

15890401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690910.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 15890401 is about 3986.2765834799. The cubic root of 15890401 is about 251.4075325365.

The spelling of 15890401 in words is "fifteen million, eight hundred ninety thousand, four hundred one".