816090420 has 48 divisors (see below), whose sum is σ = 2287974528. Its totient is φ = 217345920.

The previous prime is 816090383. The next prime is 816090437. The reversal of 816090420 is 24090618.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 40977 + ... + 57543.

It is an arithmetic number, because the mean of its divisors is an integer number (47666136).

Almost surely, 2^816090420 is an apocalyptic number.

It is an amenable number.

816090420 is an abundant number, since it is smaller than the sum of its proper divisors (1471884108).

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

816090420 is a wasteful number, since it uses less digits than its factorization.

816090420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17400 (or 17398 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 816090420 is about 28567.2963368954. The cubic root of 816090420 is about 934.5002600796.

The spelling of 816090420 in words is "eight hundred sixteen million, ninety thousand, four hundred twenty".