621245634 has 16 divisors (see below), whose sum is σ = 1249434720. Its totient is φ = 205924640.

The previous prime is 621245629. The next prime is 621245657. The reversal of 621245634 is 436542126.

It is a super-2 number, since 2×621245634² = 771892275528123912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621245595 and 621245604.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 288147 + ... + 290294.

It is an arithmetic number, because the mean of its divisors is an integer number (78089670).

Almost surely, 2^621245634 is an apocalyptic number.

621245634 is an abundant number, since it is smaller than the sum of its proper divisors (628189086).

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

621245634 is a wasteful number, since it uses less digits than its factorization.

621245634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578625.

The product of its digits is 34560, while the sum is 33.

The square root of 621245634 is about 24924.7995779304. The cubic root of 621245634 is about 853.2725671180.

The spelling of 621245634 in words is "six hundred twenty-one million, two hundred forty-five thousand, six hundred thirty-four".