22745390 has 16 divisors (see below), whose sum is σ = 42722208. Its totient is φ = 8702496.

The previous prime is 22745389. The next prime is 22745419. The reversal of 22745390 is 9354722.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49217 + ... + 49676.

It is an arithmetic number, because the mean of its divisors is an integer number (2670138).

Almost surely, 2^22745390 is an apocalyptic number.

22745390 is a deficient number, since it is larger than the sum of its proper divisors (19976818).

22745390 is a wasteful number, since it uses less digits than its factorization.

22745390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98923.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 22745390 is about 4769.2127232909. The cubic root of 22745390 is about 283.3334148404. Note that the first 3 decimals are identical.

It can be divided in two parts, 227 and 45390, that multiplied together give a triangular number (10303530 = T₄₅₃₉).

The spelling of 22745390 in words is "twenty-two million, seven hundred forty-five thousand, three hundred ninety".