22400397 has 24 divisors (see below), whose sum is σ = 33291648. Its totient is φ = 14508000.

The previous prime is 22400369. The next prime is 22400419. The reversal of 22400397 is 79300422.

It is not a de Polignac number, because 22400397 - 2⁶ = 22400333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22400397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71872 + ... + 72182.

It is an arithmetic number, because the mean of its divisors is an integer number (1387152).

Almost surely, 2^22400397 is an apocalyptic number.

It is an amenable number.

22400397 is a deficient number, since it is larger than the sum of its proper divisors (10891251).

22400397 is a wasteful number, since it uses less digits than its factorization.

22400397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 22400397 is about 4732.9057670738. The cubic root of 22400397 is about 281.8936146166.

The spelling of 22400397 in words is "twenty-two million, four hundred thousand, three hundred ninety-seven".