223540690 has 32 divisors (see below), whose sum is σ = 416586240. Its totient is φ = 86275200.

The previous prime is 223540649. The next prime is 223540693. The reversal of 223540690 is 96045322.

It is a super-2 number, since 2×223540690² = 99940880171352200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (223540693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129030 + ... + 130750.

It is an arithmetic number, because the mean of its divisors is an integer number (13018320).

Almost surely, 2^223540690 is an apocalyptic number.

223540690 is a deficient number, since it is larger than the sum of its proper divisors (193045550).

223540690 is a wasteful number, since it uses less digits than its factorization.

223540690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 223540690 is about 14951.2772029683. The cubic root of 223540690 is about 606.9024104270.

The spelling of 223540690 in words is "two hundred twenty-three million, five hundred forty thousand, six hundred ninety".