621244146 has 16 divisors (see below), whose sum is σ = 1243063584. Its totient is φ = 206985504.

The previous prime is 621244139. The next prime is 621244157. The reversal of 621244146 is 641442126.

It is a happy number.

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, 9235 + ... + 36438.

It is an arithmetic number, because the mean of its divisors is an integer number (77691474).

Almost surely, 2^621244146 is an apocalyptic number.

621244146 is an abundant number, since it is smaller than the sum of its proper divisors (621819438).

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

621244146 is a wasteful number, since it uses less digits than its factorization.

621244146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47945.

The product of its digits is 9216, while the sum is 30.

The square root of 621244146 is about 24924.7697281239. The cubic root of 621244146 is about 853.2718858680.

The spelling of 621244146 in words is "six hundred twenty-one million, two hundred forty-four thousand, one hundred forty-six".