420135994 has 16 divisors (see below), whose sum is σ = 688801536. Its totient is φ = 191332800.

The previous prime is 420135973. The next prime is 420136007. The reversal of 420135994 is 499531024.

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, 198252 + ... + 200359.

It is an arithmetic number, because the mean of its divisors is an integer number (43050096).

Almost surely, 2^420135994 is an apocalyptic number.

420135994 is a deficient number, since it is larger than the sum of its proper divisors (268665542).

420135994 is a wasteful number, since it uses less digits than its factorization.

420135994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398661.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 420135994 is about 20497.2191772445. The cubic root of 420135994 is about 748.9680587067.

The spelling of 420135994 in words is "four hundred twenty million, one hundred thirty-five thousand, nine hundred ninety-four".