2491764 has 48 divisors (see below), whose sum is σ = 6504960. Its totient is φ = 735840.

The previous prime is 2491759. The next prime is 2491777. The reversal of 2491764 is 4671942.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 5457 + ... + 5895.

It is an arithmetic number, because the mean of its divisors is an integer number (135520).

2^2491764 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 2491764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3252480).

2491764 is an abundant number, since it is smaller than the sum of its proper divisors (4013196).

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

2491764 is a wasteful number, since it uses less digits than its factorization.

2491764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 498 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 2491764 is about 1578.5322296361. The cubic root of 2491764 is about 135.5716772409.

The spelling of 2491764 in words is "two million, four hundred ninety-one thousand, seven hundred sixty-four".