620731406 has 16 divisors (see below), whose sum is σ = 1022716800. Its totient is φ = 281246328.

The previous prime is 620731393. The next prime is 620731411. The reversal of 620731406 is 604137026.

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 7 ways as a sum of consecutive naturals, for example, 354236 + ... + 355983.

It is an arithmetic number, because the mean of its divisors is an integer number (63919800).

Almost surely, 2^620731406 is an apocalyptic number.

620731406 is a deficient number, since it is larger than the sum of its proper divisors (401985394).

620731406 is a wasteful number, since it uses less digits than its factorization.

620731406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710263.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 620731406 is about 24914.4818529304. The cubic root of 620731406 is about 853.0370737043.

The spelling of 620731406 in words is "six hundred twenty million, seven hundred thirty-one thousand, four hundred six".