812404242 has 160 divisors (see below), whose sum is σ = 2097849600. Its totient is φ = 232906752.

The previous prime is 812404237. The next prime is 812404303. The reversal of 812404242 is 242404218.

812404242 is a `hidden beast` number, since 8 + 12 + 404 + 242 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3160978 + ... + 3161234.

It is an arithmetic number, because the mean of its divisors is an integer number (13111560).

Almost surely, 2^812404242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812404242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048924800).

812404242 is an abundant number, since it is smaller than the sum of its proper divisors (1285445358).

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

812404242 is a wasteful number, since it uses less digits than its factorization.

812404242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 812404242 is about 28502.7058715484. The cubic root of 812404242 is about 933.0911295278.

The spelling of 812404242 in words is "eight hundred twelve million, four hundred four thousand, two hundred forty-two".