2431890 has 32 divisors (see below), whose sum is σ = 6485760. Its totient is φ = 648432.

The previous prime is 2431879. The next prime is 2431909. The reversal of 2431890 is 981342.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4234 + ... + 4773.

It is an arithmetic number, because the mean of its divisors is an integer number (202680).

2^2431890 is an apocalyptic number.

2431890 is an abundant number, since it is smaller than the sum of its proper divisors (4053870).

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

2431890 is a wasteful number, since it uses less digits than its factorization.

2431890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9023 (or 9017 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2431890 is about 1559.4518267648. The cubic root of 2431890 is about 134.4769887343.

It can be divided in two parts, 2431 and 890, that added together give a triangular number (3321 = T₈₁).

The spelling of 2431890 in words is "two million, four hundred thirty-one thousand, eight hundred ninety".