22992478 has 4 divisors (see below), whose sum is σ = 34488720. Its totient is φ = 11496238.

The previous prime is 22992467. The next prime is 22992491. The reversal of 22992478 is 87429922.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5748118 + ... + 5748121.

It is an arithmetic number, because the mean of its divisors is an integer number (8622180).

Almost surely, 2^22992478 is an apocalyptic number.

22992478 is a deficient number, since it is larger than the sum of its proper divisors (11496242).

22992478 is a wasteful number, since it uses less digits than its factorization.

22992478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11496241.

The product of its digits is 145152, while the sum is 43.

The square root of 22992478 is about 4795.0472364722. The cubic root of 22992478 is about 284.3556923332.

The spelling of 22992478 in words is "twenty-two million, nine hundred ninety-two thousand, four hundred seventy-eight".