621000234 has 12 divisors (see below), whose sum is σ = 1345500546. Its totient is φ = 207000072.

The previous prime is 621000223. The next prime is 621000239. The reversal of 621000234 is 432000126.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 617771025 + 3229209 = 24855^2 + 1797^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 34500013 = 621000234 / (6 + 2 + 1 + 0 + 0 + 0 + 2 + 3 + 4).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (621000239) 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 5 ways as a sum of consecutive naturals, for example, 17249989 + ... + 17250024.

Almost surely, 2^621000234 is an apocalyptic number.

621000234 is an abundant number, since it is smaller than the sum of its proper divisors (724500312).

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

621000234 is a wasteful number, since it uses less digits than its factorization.

621000234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34500021 (or 34500018 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 621000234 is about 24919.8762838021. The cubic root of 621000234 is about 853.1602011157.

The spelling of 621000234 in words is "six hundred twenty-one million, two hundred thirty-four", and thus it is an aban number.