15400138 has 16 divisors (see below), whose sum is σ = 24948000. Its totient is φ = 7087536.

The previous prime is 15400111. The next prime is 15400159. The reversal of 15400138 is 83100451.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12381 + ... + 13567.

It is an arithmetic number, because the mean of its divisors is an integer number (1559250).

Almost surely, 2^15400138 is an apocalyptic number.

15400138 is a deficient number, since it is larger than the sum of its proper divisors (9547862).

15400138 is a wasteful number, since it uses less digits than its factorization.

15400138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 15400138 is about 3924.3009568584. The cubic root of 15400138 is about 248.7949366222.

Adding to 15400138 its reverse (83100451), we get a palindrome (98500589).

The spelling of 15400138 in words is "fifteen million, four hundred thousand, one hundred thirty-eight".