637872342 has 32 divisors (see below), whose sum is σ = 1351939680. Its totient is φ = 200282880.

The previous prime is 637872311. The next prime is 637872343. The reversal of 637872342 is 243278736.

It is a super-2 number, since 2×637872342² = 813762249377129928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 637872294 and 637872303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (637872343) 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, 37573 + ... + 51840.

It is an arithmetic number, because the mean of its divisors is an integer number (42248115).

Almost surely, 2^637872342 is an apocalyptic number.

637872342 is an abundant number, since it is smaller than the sum of its proper divisors (714067338).

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

637872342 is a wasteful number, since it uses less digits than its factorization.

637872342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89488.

The product of its digits is 338688, while the sum is 42.

The square root of 637872342 is about 25256.1347399003. The cubic root of 637872342 is about 860.8178365796.

The spelling of 637872342 in words is "six hundred thirty-seven million, eight hundred seventy-two thousand, three hundred forty-two".