621646034 has 16 divisors (see below), whose sum is σ = 943214328. Its totient is φ = 307249152.

The previous prime is 621645961. The next prime is 621646037. The reversal of 621646034 is 430646126.

It can be written as a sum of positive squares in 4 ways, for example, as 371911225 + 249734809 = 19285^2 + 15803^2 .

It is not an unprimeable number, because it can be changed into a prime (621646037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234782 + ... + 237414.

Almost surely, 2^621646034 is an apocalyptic number.

621646034 is a deficient number, since it is larger than the sum of its proper divisors (321568294).

621646034 is a wasteful number, since it uses less digits than its factorization.

621646034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 621646034 is about 24932.8304450177. The cubic root of 621646034 is about 853.4558424304.

The spelling of 621646034 in words is "six hundred twenty-one million, six hundred forty-six thousand, thirty-four".