633221872 has 20 divisors (see below), whose sum is σ = 1266444736. Its totient is φ = 306397440.

The previous prime is 633221863. The next prime is 633221881. The reversal of 633221872 is 278122336.

It is an interprime number because it is at equal distance from previous prime (633221863) and next prime (633221881).

633221872 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637833 + ... + 638824.

Almost surely, 2^633221872 is an apocalyptic number.

633221872 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

633221872 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

633221872 is a wasteful number, since it uses less digits than its factorization.

633221872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276696 (or 1276690 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 633221872 is about 25163.9001746550. The cubic root of 633221872 is about 858.7207734488.

The spelling of 633221872 in words is "six hundred thirty-three million, two hundred twenty-one thousand, eight hundred seventy-two".