851694480 has 480 divisors, whose sum is σ = 3681014400. Its totient is φ = 179407872.

The previous prime is 851694479. The next prime is 851694491. The reversal of 851694480 is 84496158.

851694480 is a `hidden beast` number, since 8 + 5 + 169 + 4 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1375611 + ... + 1376229.

It is an arithmetic number, because the mean of its divisors is an integer number (7668780).

Almost surely, 2^851694480 is an apocalyptic number.

851694480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851694480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1840507200).

851694480 is an abundant number, since it is smaller than the sum of its proper divisors (2829319920).

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

851694480 is a wasteful number, since it uses less digits than its factorization.

851694480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 851694480 is about 29183.8050980334. The cubic root of 851694480 is about 947.8972809711.

The spelling of 851694480 in words is "eight hundred fifty-one million, six hundred ninety-four thousand, four hundred eighty".