222407640 has 512 divisors, whose sum is σ = 954777600. Its totient is φ = 44789760.

The previous prime is 222407623. The next prime is 222407659. The reversal of 222407640 is 46704222.

It is a happy number.

222407640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3046644 + ... + 3046716.

It is an arithmetic number, because the mean of its divisors is an integer number (1864800).

Almost surely, 2^222407640 is an apocalyptic number.

222407640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222407640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477388800).

222407640 is an abundant number, since it is smaller than the sum of its proper divisors (732369960).

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

222407640 is a wasteful number, since it uses less digits than its factorization.

222407640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 222407640 is about 14913.3376545963. The cubic root of 222407640 is about 605.8752806761.

The spelling of 222407640 in words is "two hundred twenty-two million, four hundred seven thousand, six hundred forty".