93213720 has 128 divisors (see below), whose sum is σ = 329054400. Its totient is φ = 23390208.

The previous prime is 93213719. The next prime is 93213727. The reversal of 93213720 is 2731239.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93213727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15822 + ... + 20898.

Almost surely, 2^93213720 is an apocalyptic number.

93213720 is a gapful number since it is divisible by the number (90) 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 93213720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164527200).

93213720 is an abundant number, since it is smaller than the sum of its proper divisors (235840680).

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

93213720 is a wasteful number, since it uses less digits than its factorization.

93213720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114 (or 5104 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 93213720 is about 9654.7252679711. The cubic root of 93213720 is about 453.4122820018.

Adding to 93213720 its reverse (2731239), we get a palindrome (95944959).

It can be divided in two parts, 9321 and 3720, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 93213720 in words is "ninety-three million, two hundred thirteen thousand, seven hundred twenty".