621069858 has 24 divisors (see below), whose sum is σ = 1392054300. Its totient is φ = 199884384.

The previous prime is 621069811. The next prime is 621069859. The reversal of 621069858 is 858960126.

It can be written as a sum of positive squares in 2 ways, for example, as 571831569 + 49238289 = 23913^2 + 7017^2 .

It is a super-2 number, since 2×621069858² = 771455537032280328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621069859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 594373 + ... + 595416.

Almost surely, 2^621069858 is an apocalyptic number.

621069858 is an abundant number, since it is smaller than the sum of its proper divisors (770984442).

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

621069858 is a wasteful number, since it uses less digits than its factorization.

621069858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189826 (or 1189823 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 621069858 is about 24921.2732018250. The cubic root of 621069858 is about 853.1920841987.

The spelling of 621069858 in words is "six hundred twenty-one million, sixty-nine thousand, eight hundred fifty-eight".