812540024 has 32 divisors (see below), whose sum is σ = 1628236080. Its totient is φ = 378791424.

The previous prime is 812540023. The next prime is 812540081. The reversal of 812540024 is 420045218.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 812539975 and 812540002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812540023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13367 + ... + 42470.

Almost surely, 2^812540024 is an apocalyptic number.

It is an amenable number.

812540024 is an abundant number, since it is smaller than the sum of its proper divisors (815696056).

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

812540024 is a wasteful number, since it uses less digits than its factorization.

812540024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55967 (or 55963 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 812540024 is about 28505.0876862359. The cubic root of 812540024 is about 933.1431110067.

The spelling of 812540024 in words is "eight hundred twelve million, five hundred forty thousand, twenty-four".