635970642 has 16 divisors (see below), whose sum is σ = 1312972032. Its totient is φ = 205151760.

The previous prime is 635970613. The next prime is 635970653. The reversal of 635970642 is 246079536.

635970642 is nontrivially palindromic in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 635970594 and 635970603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1709413 + ... + 1709784.

It is an arithmetic number, because the mean of its divisors is an integer number (82060752).

Almost surely, 2^635970642 is an apocalyptic number.

635970642 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

635970642 is an abundant number, since it is smaller than the sum of its proper divisors (677001390).

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

635970642 is a wasteful number, since it uses less digits than its factorization.

635970642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419233.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 635970642 is about 25218.4583589085. The cubic root of 635970642 is about 859.9615279346.

The spelling of 635970642 in words is "six hundred thirty-five million, nine hundred seventy thousand, six hundred forty-two".