840801900 has 36 divisors (see below), whose sum is σ = 2432721032. Its totient is φ = 224213760.

The previous prime is 840801893. The next prime is 840801953. The reversal of 840801900 is 9108048.

It is a happy number.

It is a super-2 number, since 2×840801900² = 1413895670087220000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1401037 + ... + 1401636.

Almost surely, 2^840801900 is an apocalyptic number.

It is an amenable number.

840801900 is an abundant number, since it is smaller than the sum of its proper divisors (1591919132).

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

840801900 is a wasteful number, since it uses less digits than its factorization.

840801900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802690 (or 2802683 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 840801900 is about 28996.5842816012. The cubic root of 840801900 is about 943.8389480949.

Adding to 840801900 its reverse (9108048), we get a palindrome (849909948).

The spelling of 840801900 in words is "eight hundred forty million, eight hundred one thousand, nine hundred".