22478012 has 24 divisors (see below), whose sum is σ = 42341040. Its totient is φ = 10402560.

The previous prime is 22478003. The next prime is 22478023. The reversal of 22478012 is 21087422.

It is a super-2 number, since 2×22478012² = 1010522046944288, which contains 22 as substring.

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, 1439 + ... + 6857.

It is an arithmetic number, because the mean of its divisors is an integer number (1764210).

Almost surely, 2^22478012 is an apocalyptic number.

It is an amenable number.

22478012 is a deficient number, since it is larger than the sum of its proper divisors (19863028).

22478012 is a wasteful number, since it uses less digits than its factorization.

22478012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501 (or 5499 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 22478012 is about 4741.0981850200. The cubic root of 22478012 is about 282.2188164684.

The spelling of 22478012 in words is "twenty-two million, four hundred seventy-eight thousand, twelve".