72821894 has 24 divisors (see below), whose sum is σ = 114077808. Its totient is φ = 34851440.

The previous prime is 72821873. The next prime is 72821899. The reversal of 72821894 is 49812827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72821899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233999 + ... + 234309.

It is an arithmetic number, because the mean of its divisors is an integer number (4753242).

Almost surely, 2^72821894 is an apocalyptic number.

72821894 is a deficient number, since it is larger than the sum of its proper divisors (41255914).

72821894 is a wasteful number, since it uses less digits than its factorization.

72821894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 413 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 72821894 is about 8533.5745148209. The cubic root of 72821894 is about 417.5937499676.

It can be divided in two parts, 728 and 21894, that added together give a palindrome (22622).

The spelling of 72821894 in words is "seventy-two million, eight hundred twenty-one thousand, eight hundred ninety-four".