812749480 has 16 divisors (see below), whose sum is σ = 1828686420. Its totient is φ = 325099776.

The previous prime is 812749451. The next prime is 812749499. The reversal of 812749480 is 84947218.

It can be written as a sum of positive squares in 2 ways, for example, as 803495716 + 9253764 = 28346^2 + 3042^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10159329 + ... + 10159408.

Almost surely, 2^812749480 is an apocalyptic number.

It is an amenable number.

812749480 is an abundant number, since it is smaller than the sum of its proper divisors (1015936940).

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

812749480 is a wasteful number, since it uses less digits than its factorization.

812749480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20318748 (or 20318744 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 812749480 is about 28508.7614602950. The cubic root of 812749480 is about 933.2232857778.

The spelling of 812749480 in words is "eight hundred twelve million, seven hundred forty-nine thousand, four hundred eighty".