420067790 has 32 divisors (see below), whose sum is σ = 803019744. Its totient is φ = 157665280.

The previous prime is 420067783. The next prime is 420067819. The reversal of 420067790 is 97760024.

It is a self number, because there is not a number n which added to its sum of digits gives 420067790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55430 + ... + 62550.

It is an arithmetic number, because the mean of its divisors is an integer number (25094367).

Almost surely, 2^420067790 is an apocalyptic number.

420067790 is a deficient number, since it is larger than the sum of its proper divisors (382951954).

420067790 is a wasteful number, since it uses less digits than its factorization.

420067790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7492.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 420067790 is about 20495.5553718361. Note that the first 3 decimals coincide. The cubic root of 420067790 is about 748.9275278765.

The spelling of 420067790 in words is "four hundred twenty million, sixty-seven thousand, seven hundred ninety".