801220990 has 32 divisors (see below), whose sum is σ = 1512406080. Its totient is φ = 305190144.

The previous prime is 801220969. The next prime is 801220991. The reversal of 801220990 is 99022108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801220991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2247 + ... + 40093.

It is an arithmetic number, because the mean of its divisors is an integer number (47262690).

Almost surely, 2^801220990 is an apocalyptic number.

801220990 is a deficient number, since it is larger than the sum of its proper divisors (711185090).

801220990 is a wasteful number, since it uses less digits than its factorization.

801220990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37956.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 801220990 is about 28305.8472757838. The cubic root of 801220990 is about 928.7898044525.

The spelling of 801220990 in words is "eight hundred one million, two hundred twenty thousand, nine hundred ninety".