89778420 has 72 divisors (see below), whose sum is σ = 286671840. Its totient is φ = 22680000.

The previous prime is 89778419. The next prime is 89778427. The reversal of 89778420 is 2487798.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89778427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9706 + ... + 16545.

Almost surely, 2^89778420 is an apocalyptic number.

It is an amenable number.

89778420 is an abundant number, since it is smaller than the sum of its proper divisors (196893420).

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

89778420 is a wasteful number, since it uses less digits than its factorization.

89778420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26285 (or 26280 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 89778420 is about 9475.1474922557. The cubic root of 89778420 is about 447.7723984729.

The spelling of 89778420 in words is "eighty-nine million, seven hundred seventy-eight thousand, four hundred twenty".