89723287840 has 24 divisors (see below), whose sum is σ = 211971267900. Its totient is φ = 35889315072.

The previous prime is 89723287811. The next prime is 89723287867. The reversal of 89723287840 is 4878232798.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 75618400144 + 14104887696 = 274988^2 + 118764^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280385115 + ... + 280385434.

Almost surely, 2^89723287840 is an apocalyptic number.

89723287840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

89723287840 is an abundant number, since it is smaller than the sum of its proper divisors (122247980060).

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

89723287840 is a wasteful number, since it uses less digits than its factorization.

89723287840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560770564 (or 560770556 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 89723287840 in words is "eighty-nine billion, seven hundred twenty-three million, two hundred eighty-seven thousand, eight hundred forty".