224138992 has 40 divisors (see below), whose sum is σ = 541429632. Its totient is φ = 87326400.

The previous prime is 224138969. The next prime is 224139001. The reversal of 224138992 is 299831422.

224138992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 89734 + ... + 92197.

Almost surely, 2^224138992 is an apocalyptic number.

224138992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

224138992 is an abundant number, since it is smaller than the sum of its proper divisors (317290640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

224138992 is a wasteful number, since it uses less digits than its factorization.

224138992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181957 (or 181951 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 224138992 is about 14971.2722238292. The cubic root of 224138992 is about 607.4433819668.

The spelling of 224138992 in words is "two hundred twenty-four million, one hundred thirty-eight thousand, nine hundred ninety-two".