621855342 has 24 divisors (see below), whose sum is σ = 1426610016. Its totient is φ = 195091776.

The previous prime is 621855329. The next prime is 621855361. The reversal of 621855342 is 243558126.

621855342 is a `hidden beast` number, since 62 + 1 + 8 + 553 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 621855297 and 621855306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1015798 + ... + 1016409.

It is an arithmetic number, because the mean of its divisors is an integer number (59442084).

Almost surely, 2^621855342 is an apocalyptic number.

621855342 is an abundant number, since it is smaller than the sum of its proper divisors (804754674).

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

621855342 is a wasteful number, since it uses less digits than its factorization.

621855342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032232 (or 2032229 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 621855342 is about 24937.0275293588. The cubic root of 621855342 is about 853.5516177755.

The spelling of 621855342 in words is "six hundred twenty-one million, eight hundred fifty-five thousand, three hundred forty-two".