633729940 has 12 divisors (see below), whose sum is σ = 1330832916. Its totient is φ = 253491968.

The previous prime is 633729913. The next prime is 633729949. The reversal of 633729940 is 49927336.

It can be written as a sum of positive squares in 2 ways, for example, as 484792324 + 148937616 = 22018^2 + 12204^2 .

It is a super-2 number, since 2×633729940² = 803227273704807200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633729949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15843229 + ... + 15843268.

It is an arithmetic number, because the mean of its divisors is an integer number (110902743).

Almost surely, 2^633729940 is an apocalyptic number.

It is an amenable number.

633729940 is an abundant number, since it is smaller than the sum of its proper divisors (697102976).

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

633729940 is a wasteful number, since it uses less digits than its factorization.

633729940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31686506 (or 31686504 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 633729940 is about 25173.9933264470. The cubic root of 633729940 is about 858.9503780215.

The spelling of 633729940 in words is "six hundred thirty-three million, seven hundred twenty-nine thousand, nine hundred forty".