619921804 has 24 divisors (see below), whose sum is σ = 1121551200. Its totient is φ = 299617920.

The previous prime is 619921793. The next prime is 619921807. The reversal of 619921804 is 408129916.

It is a super-2 number, since 2×619921804² = 768606086149228832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (619921807) by changing a digit.

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, 537 + ... + 35215.

It is an arithmetic number, because the mean of its divisors is an integer number (46731300).

Almost surely, 2^619921804 is an apocalyptic number.

It is an amenable number.

619921804 is a deficient number, since it is larger than the sum of its proper divisors (501629396).

619921804 is a wasteful number, since it uses less digits than its factorization.

619921804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34833 (or 34831 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 619921804 is about 24898.2289329984. The cubic root of 619921804 is about 852.6660484996. Note that the first 3 decimals are identical.

The spelling of 619921804 in words is "six hundred nineteen million, nine hundred twenty-one thousand, eight hundred four".