223978612 has 96 divisors (see below), whose sum is σ = 498718080. Its totient is φ = 86469120.

The previous prime is 223978607. The next prime is 223978619. The reversal of 223978612 is 216879322.

223978612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223978619) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401838 + ... + 402394.

It is an arithmetic number, because the mean of its divisors is an integer number (5194980).

Almost surely, 2^223978612 is an apocalyptic number.

223978612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

223978612 is an abundant number, since it is smaller than the sum of its proper divisors (274739468).

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

223978612 is a wasteful number, since it uses less digits than its factorization.

223978612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 639 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 223978612 is about 14965.9150071087. The cubic root of 223978612 is about 607.2984644251.

The spelling of 223978612 in words is "two hundred twenty-three million, nine hundred seventy-eight thousand, six hundred twelve".