621396282 has 32 divisors (see below), whose sum is σ = 1384548480. Its totient is φ = 184605120.

The previous prime is 621396277. The next prime is 621396283. The reversal of 621396282 is 282693126.

It is a happy number.

It is a super-2 number, since 2×621396282² = 772266678566847048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 621396282.

It is not an unprimeable number, because it can be changed into a prime (621396283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135094 + ... + 139617.

It is an arithmetic number, because the mean of its divisors is an integer number (43267140).

Almost surely, 2^621396282 is an apocalyptic number.

621396282 is an abundant number, since it is smaller than the sum of its proper divisors (763152198).

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

621396282 is a wasteful number, since it uses less digits than its factorization.

621396282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274758.

The product of its digits is 62208, while the sum is 39.

The square root of 621396282 is about 24927.8214451243. The cubic root of 621396282 is about 853.3415325479.

The spelling of 621396282 in words is "six hundred twenty-one million, three hundred ninety-six thousand, two hundred eighty-two".