2400156 has 108 divisors (see below), whose sum is σ = 7261800. Its totient is φ = 665280.

The previous prime is 2400143. The next prime is 2400157. The reversal of 2400156 is 6510042.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400157) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82750 + ... + 82778.

2^2400156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2400156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3630900).

2400156 is an abundant number, since it is smaller than the sum of its proper divisors (4861644).

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

2400156 is a wasteful number, since it uses less digits than its factorization.

2400156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2400156 is about 1549.2436864483. The cubic root of 2400156 is about 133.8894908297.

Adding to 2400156 its reverse (6510042), we get a palindrome (8910198).

It can be divided in two parts, 2400 and 156, that added together give a triangular number (2556 = T₇₁).

The spelling of 2400156 in words is "two million, four hundred thousand, one hundred fifty-six".