634940376 has 64 divisors (see below), whose sum is σ = 1820448000. Its totient is φ = 180778368.

The previous prime is 634940351. The next prime is 634940377. The reversal of 634940376 is 673049436.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634940377) 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, 42775 + ... + 55673.

It is an arithmetic number, because the mean of its divisors is an integer number (28444500).

Almost surely, 2^634940376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634940376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (910224000).

634940376 is an abundant number, since it is smaller than the sum of its proper divisors (1185507624).

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

634940376 is a wasteful number, since it uses less digits than its factorization.

634940376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13208 (or 13204 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 42.

The square root of 634940376 is about 25198.0232558032. The cubic root of 634940376 is about 859.4969006247.

The spelling of 634940376 in words is "six hundred thirty-four million, nine hundred forty thousand, three hundred seventy-six".