811929450 has 48 divisors (see below), whose sum is σ = 2043663840. Its totient is φ = 213280320.

The previous prime is 811929449. The next prime is 811929473. The reversal of 811929450 is 54929118.

It is a junction number, because it is equal to n+sod(n) for n = 811929399 and 811929408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30345 + ... + 50444.

It is an arithmetic number, because the mean of its divisors is an integer number (42576330).

Almost surely, 2^811929450 is an apocalyptic number.

811929450 is an abundant number, since it is smaller than the sum of its proper divisors (1231734390).

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

811929450 is a wasteful number, since it uses less digits than its factorization.

811929450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80871 (or 80866 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 811929450 is about 28494.3757608409. The cubic root of 811929450 is about 932.9093191622.

The spelling of 811929450 in words is "eight hundred eleven million, nine hundred twenty-nine thousand, four hundred fifty".