190404840 has 32 divisors (see below), whose sum is σ = 571214880. Its totient is φ = 50774592.

The previous prime is 190404839. The next prime is 190404869. The reversal of 190404840 is 48404091.

190404840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 190404798 and 190404807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793234 + ... + 793473.

It is an arithmetic number, because the mean of its divisors is an integer number (17850465).

Almost surely, 2^190404840 is an apocalyptic number.

190404840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190404840 is an abundant number, since it is smaller than the sum of its proper divisors (380810040).

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

190404840 is a wasteful number, since it uses less digits than its factorization.

190404840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586721 (or 1586717 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 190404840 is about 13798.7260281520. The cubic root of 190404840 is about 575.2977311284.

The spelling of 190404840 in words is "one hundred ninety million, four hundred four thousand, eight hundred forty".