223956540 has 36 divisors (see below), whose sum is σ = 679335384. Its totient is φ = 59721696.

The previous prime is 223956533. The next prime is 223956541. The reversal of 223956540 is 45659322.

223956540 is a `hidden beast` number, since 2 + 23 + 95 + 6 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 223956495 and 223956504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223956541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 621922 + ... + 622281.

Almost surely, 2^223956540 is an apocalyptic number.

223956540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223956540 is an abundant number, since it is smaller than the sum of its proper divisors (455378844).

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

223956540 is a wasteful number, since it uses less digits than its factorization.

223956540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244218 (or 1244213 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 223956540 is about 14965.1775799688. The cubic root of 223956540 is about 607.2785150024.

The spelling of 223956540 in words is "two hundred twenty-three million, nine hundred fifty-six thousand, five hundred forty".