421612390 has 16 divisors (see below), whose sum is σ = 759452832. Its totient is φ = 168522624.

The previous prime is 421612381. The next prime is 421612391. The reversal of 421612390 is 93216124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421612391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99 + ... + 29038.

It is an arithmetic number, because the mean of its divisors is an integer number (47465802).

Almost surely, 2^421612390 is an apocalyptic number.

421612390 is a deficient number, since it is larger than the sum of its proper divisors (337840442).

421612390 is a wasteful number, since it uses less digits than its factorization.

421612390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30591.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 421612390 is about 20533.2021370268. The cubic root of 421612390 is about 749.8443469577.

It can be divided in two parts, 42161 and 2390, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 421612390 in words is "four hundred twenty-one million, six hundred twelve thousand, three hundred ninety".