812249340 has 48 divisors (see below), whose sum is σ = 2599199232. Its totient is φ = 185656896.

The previous prime is 812249309. The next prime is 812249351. The reversal of 812249340 is 43942218.

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, 966544 + ... + 967383.

It is an arithmetic number, because the mean of its divisors is an integer number (54149984).

Almost surely, 2^812249340 is an apocalyptic number.

It is an amenable number.

812249340 is an abundant number, since it is smaller than the sum of its proper divisors (1786949892).

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

812249340 is a wasteful number, since it uses less digits than its factorization.

812249340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933946 (or 1933944 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 812249340 is about 28499.9884210503. The cubic root of 812249340 is about 933.0318212582.

The spelling of 812249340 in words is "eight hundred twelve million, two hundred forty-nine thousand, three hundred forty".