635493540 has 48 divisors (see below), whose sum is σ = 1941145920. Its totient is φ = 154058880.

The previous prime is 635493539. The next prime is 635493601. The reversal of 635493540 is 45394536.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480775 + ... + 482094.

It is an arithmetic number, because the mean of its divisors is an integer number (40440540).

Almost surely, 2^635493540 is an apocalyptic number.

635493540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

635493540 is an abundant number, since it is smaller than the sum of its proper divisors (1305652380).

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

635493540 is a wasteful number, since it uses less digits than its factorization.

635493540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962892 (or 962890 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 635493540 is about 25208.9972033796. The cubic root of 635493540 is about 859.7464278553.

The spelling of 635493540 in words is "six hundred thirty-five million, four hundred ninety-three thousand, five hundred forty".