15400085 has 4 divisors (see below), whose sum is σ = 18480108. Its totient is φ = 12320064.

The previous prime is 15400057. The next prime is 15400093. The reversal of 15400085 is 58000451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58000451 = 1663 ⋅34877.

It can be written as a sum of positive squares in 2 ways, for example, as 3407716 + 11992369 = 1846^2 + 3463^2 .

It is a cyclic number.

It is not a de Polignac number, because 15400085 - 2¹⁰ = 15399061 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 15400085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540004 + ... + 1540013.

It is an arithmetic number, because the mean of its divisors is an integer number (4620027).

Almost surely, 2^15400085 is an apocalyptic number.

It is an amenable number.

15400085 is a deficient number, since it is larger than the sum of its proper divisors (3080023).

15400085 is an equidigital number, since it uses as much as digits as its factorization.

15400085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080022.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 15400085 is about 3924.2942040576. The cubic root of 15400085 is about 248.7946512103.

The spelling of 15400085 in words is "fifteen million, four hundred thousand, eighty-five".