620403894 has 32 divisors (see below), whose sum is σ = 1504010880. Its totient is φ = 188001000.

The previous prime is 620403881. The next prime is 620403919. The reversal of 620403894 is 498304026.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521632 + ... + 522819.

It is an arithmetic number, because the mean of its divisors is an integer number (47000340).

Almost surely, 2^620403894 is an apocalyptic number.

620403894 is an abundant number, since it is smaller than the sum of its proper divisors (883606986).

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

620403894 is a wasteful number, since it uses less digits than its factorization.

620403894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044473 (or 1044467 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 620403894 is about 24907.9082622367. The cubic root of 620403894 is about 852.8870200603.

The spelling of 620403894 in words is "six hundred twenty million, four hundred three thousand, eight hundred ninety-four".