2491776 has 128 divisors (see below), whose sum is σ = 8486400. Its totient is φ = 705024.

The previous prime is 2491759. The next prime is 2491777. The reversal of 2491776 is 6771942.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 2491776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24141 + ... + 24243.

It is an arithmetic number, because the mean of its divisors is an integer number (66300).

2^2491776 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 2491776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4243200).

2491776 is an abundant number, since it is smaller than the sum of its proper divisors (5994624).

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

2491776 is a wasteful number, since it uses less digits than its factorization.

2491776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 115 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 2491776 is about 1578.5360306309. The cubic root of 2491776 is about 135.5718948722.

It can be divided in two parts, 249 and 1776, that added together give a square (2025 = 45²).

The spelling of 2491776 in words is "two million, four hundred ninety-one thousand, seven hundred seventy-six".