421618402 has 8 divisors (see below), whose sum is σ = 632760912. Its totient is φ = 210698100.

The previous prime is 421618399. The next prime is 421618409. The reversal of 421618402 is 204816124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (421618409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50724 + ... + 58447.

It is an arithmetic number, because the mean of its divisors is an integer number (79095114).

Almost surely, 2^421618402 is an apocalyptic number.

421618402 is a deficient number, since it is larger than the sum of its proper divisors (211142510).

421618402 is a wasteful number, since it uses less digits than its factorization.

421618402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111104.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 421618402 is about 20533.3485335442. The cubic root of 421618402 is about 749.8479110866.

The spelling of 421618402 in words is "four hundred twenty-one million, six hundred eighteen thousand, four hundred two".