812457450 has 144 divisors (see below), whose sum is σ = 2521296960. Its totient is φ = 183720960.

The previous prime is 812457449. The next prime is 812457469. The reversal of 812457450 is 54754218.

812457450 is a `hidden beast` number, since 81 + 2 + 4 + 574 + 5 + 0 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 304221 + ... + 306879.

Almost surely, 2^812457450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812457450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260648480).

812457450 is an abundant number, since it is smaller than the sum of its proper divisors (1708839510).

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

812457450 is a wasteful number, since it uses less digits than its factorization.

812457450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2773 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 812457450 is about 28503.6392413320. The cubic root of 812457450 is about 933.1114998584. Note that the first 3 decimals are identical.

The spelling of 812457450 in words is "eight hundred twelve million, four hundred fifty-seven thousand, four hundred fifty".