634166540 has 48 divisors (see below), whose sum is σ = 1524096000. Its totient is φ = 217129152.

The previous prime is 634166531. The next prime is 634166543. The reversal of 634166540 is 45661436.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 634166540.

It is not an unprimeable number, because it can be changed into a prime (634166543) 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, 114761 + ... + 120159.

It is an arithmetic number, because the mean of its divisors is an integer number (31752000).

Almost surely, 2^634166540 is an apocalyptic number.

It is an amenable number.

634166540 is an abundant number, since it is smaller than the sum of its proper divisors (889929460).

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

634166540 is a wasteful number, since it uses less digits than its factorization.

634166540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6254 (or 6252 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 634166540 is about 25182.6634810538. The cubic root of 634166540 is about 859.1475869708.

The spelling of 634166540 in words is "six hundred thirty-four million, one hundred sixty-six thousand, five hundred forty".