22994391 has 16 divisors (see below), whose sum is σ = 35112704. Its totient is φ = 13112064.

The previous prime is 22994383. The next prime is 22994417. The reversal of 22994391 is 19349922.

It is not a de Polignac number, because 22994391 - 2³ = 22994383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22994311) 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, 13320 + ... + 14946.

It is an arithmetic number, because the mean of its divisors is an integer number (2194544).

Almost surely, 2^22994391 is an apocalyptic number.

22994391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22994391 is a deficient number, since it is larger than the sum of its proper divisors (12118313).

22994391 is a wasteful number, since it uses less digits than its factorization.

22994391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310.

The product of its digits is 34992, while the sum is 39.

The square root of 22994391 is about 4795.2467089817. The cubic root of 22994391 is about 284.3635783522.

It can be divided in two parts, 2299439 and 1, that added together give a triangular number (2299440 = T₂₁₄₄).

The spelling of 22994391 in words is "twenty-two million, nine hundred ninety-four thousand, three hundred ninety-one".