2291624 has 8 divisors (see below), whose sum is σ = 4296810. Its totient is φ = 1145808.

The previous prime is 2291623. The next prime is 2291629. The reversal of 2291624 is 4261922.

It can be written as a sum of positive squares in only one way, i.e., 2010724 + 280900 = 1418^2 + 530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2291593 and 2291602.

It is not an unprimeable number, because it can be changed into a prime (2291623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143219 + ... + 143234.

2^2291624 is an apocalyptic number.

It is an amenable number.

2291624 is a deficient number, since it is larger than the sum of its proper divisors (2005186).

2291624 is a wasteful number, since it uses less digits than its factorization.

2291624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286459 (or 286455 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 2291624 is about 1513.8110846470. The cubic root of 2291624 is about 131.8401800061.

The spelling of 2291624 in words is "two million, two hundred ninety-one thousand, six hundred twenty-four".