2015400 has 48 divisors (see below), whose sum is σ = 6249600. Its totient is φ = 537280.

The previous prime is 2015393. The next prime is 2015411. The reversal of 2015400 is 45102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1080 + ... + 2279.

It is an arithmetic number, because the mean of its divisors is an integer number (130200).

2^2015400 is an apocalyptic number.

2015400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015400 is an abundant number, since it is smaller than the sum of its proper divisors (4234200).

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

2015400 is a wasteful number, since it uses less digits than its factorization.

2015400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378 (or 3369 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 2015400 is about 1419.6478436570. The cubic root of 2015400 is about 126.3146582501.

It can be divided in two parts, 2015 and 400, that added together give a triangular number (2415 = T₆₉).

The spelling of 2015400 in words is "two million, fifteen thousand, four hundred".