2150400 has 156 divisors (see below), whose sum is σ = 8125472. Its totient is φ = 491520.

The previous prime is 2150399. The next prime is 2150411. The reversal of 2150400 is 40512.

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

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 200 × 56 × 192.

It is a congruent number.

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, 307197 + ... + 307203.

2^2150400 is an apocalyptic number.

2150400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2150400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4062736).

2150400 is an abundant number, since it is smaller than the sum of its proper divisors (5975072).

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

2150400 is an equidigital number, since it uses as much as digits as its factorization.

2150400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44 (or 17 counting only the distinct ones).

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

The square root of 2150400 is about 1466.4242223859. The cubic root of 2150400 is about 129.0742916820.

Adding to 2150400 its reverse (40512), we get a palindrome (2190912).

The spelling of 2150400 in words is "two million, one hundred fifty thousand, four hundred".