612789894 has 64 divisors (see below), whose sum is σ = 1415232000. Its totient is φ = 196308000.

The previous prime is 612789889. The next prime is 612789917. The reversal of 612789894 is 498987216.

It is a super-2 number, since 2×612789894² = 751022908377062472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 612789894.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 392287 + ... + 393845.

It is an arithmetic number, because the mean of its divisors is an integer number (22113000).

Almost surely, 2^612789894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612789894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (707616000).

612789894 is an abundant number, since it is smaller than the sum of its proper divisors (802442106).

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

612789894 is a wasteful number, since it uses less digits than its factorization.

612789894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850 (or 1844 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 612789894 is about 24754.5933919344. The cubic root of 612789894 is about 849.3835872315.

The spelling of 612789894 in words is "six hundred twelve million, seven hundred eighty-nine thousand, eight hundred ninety-four".