15400868 has 24 divisors (see below), whose sum is σ = 32424000. Its totient is φ = 6252768.

The previous prime is 15400867. The next prime is 15400873. The reversal of 15400868 is 86800451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15400867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13943 + ... + 15006.

It is an arithmetic number, because the mean of its divisors is an integer number (1351000).

Almost surely, 2^15400868 is an apocalyptic number.

It is an amenable number.

15400868 is an abundant number, since it is smaller than the sum of its proper divisors (17023132).

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

15400868 is a wasteful number, since it uses less digits than its factorization.

15400868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28979 (or 28977 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 15400868 is about 3924.3939659519. The cubic root of 15400868 is about 248.7988677002.

The spelling of 15400868 in words is "fifteen million, four hundred thousand, eight hundred sixty-eight".