2391404 has 12 divisors (see below), whose sum is σ = 4195800. Its totient is φ = 1192608.

The previous prime is 2391401. The next prime is 2391437. The reversal of 2391404 is 4041932.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2391404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2552 + ... + 3360.

It is an arithmetic number, because the mean of its divisors is an integer number (349650).

2^2391404 is an apocalyptic number.

It is an amenable number.

2391404 is a deficient number, since it is larger than the sum of its proper divisors (1804396).

2391404 is a wasteful number, since it uses less digits than its factorization.

2391404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2391404 is about 1546.4165027573. The cubic root of 2391404 is about 133.7265530856.

The spelling of 2391404 in words is "two million, three hundred ninety-one thousand, four hundred four".