634737042 has 12 divisors (see below), whose sum is σ = 1375263630. Its totient is φ = 211579008.

The previous prime is 634737001. The next prime is 634737067. The reversal of 634737042 is 240737436.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 595311201 + 39425841 = 24399^2 + 6279^2 .

It is a super-2 number, since 2×634737042² = 805782224973819528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 634736988 and 634737006.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17631567 + ... + 17631602.

Almost surely, 2^634737042 is an apocalyptic number.

634737042 is an abundant number, since it is smaller than the sum of its proper divisors (740526588).

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

634737042 is a wasteful number, since it uses less digits than its factorization.

634737042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35263177 (or 35263174 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 36.

The square root of 634737042 is about 25193.9882114762. The cubic root of 634737042 is about 859.4051420868.

The spelling of 634737042 in words is "six hundred thirty-four million, seven hundred thirty-seven thousand, forty-two".