429905640 has 32 divisors (see below), whose sum is σ = 1289717280. Its totient is φ = 114641472.

The previous prime is 429905617. The next prime is 429905659. The reversal of 429905640 is 46509924.

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, 1791154 + ... + 1791393.

It is an arithmetic number, because the mean of its divisors is an integer number (40303665).

Almost surely, 2^429905640 is an apocalyptic number.

429905640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

429905640 is an abundant number, since it is smaller than the sum of its proper divisors (859811640).

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

429905640 is a wasteful number, since it uses less digits than its factorization.

429905640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582561 (or 3582557 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 429905640 is about 20734.1660068593. The cubic root of 429905640 is about 754.7290169711.

The spelling of 429905640 in words is "four hundred twenty-nine million, nine hundred five thousand, six hundred forty".