22729775 has 12 divisors (see below), whose sum is σ = 28300272. Its totient is φ = 18109440.

The previous prime is 22729769. The next prime is 22729781. The reversal of 22729775 is 57792722.

It is an interprime number because it is at equal distance from previous prime (22729769) and next prime (22729781).

It is not a de Polignac number, because 22729775 - 2⁸ = 22729519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4847 + ... + 8303.

It is an arithmetic number, because the mean of its divisors is an integer number (2358356).

Almost surely, 2^22729775 is an apocalyptic number.

22729775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22729775 is a deficient number, since it is larger than the sum of its proper divisors (5570497).

22729775 is a wasteful number, since it uses less digits than its factorization.

22729775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730 (or 3725 counting only the distinct ones).

The product of its digits is 123480, while the sum is 41.

The square root of 22729775 is about 4767.5753795824. The cubic root of 22729775 is about 283.2685626646.

The spelling of 22729775 in words is "twenty-two million, seven hundred twenty-nine thousand, seven hundred seventy-five".