88428421 has 4 divisors (see below), whose sum is σ = 88452000. Its totient is φ = 88404844.

The previous prime is 88428391. The next prime is 88428427. The reversal of 88428421 is 12482488.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 88428421 - 2¹³ = 88420229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88428427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4771 + ... + 14128.

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

Almost surely, 2^88428421 is an apocalyptic number.

It is an amenable number.

88428421 is a deficient number, since it is larger than the sum of its proper divisors (23579).

88428421 is a wasteful number, since it uses less digits than its factorization.

88428421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23578.

The product of its digits is 32768, while the sum is 37.

The square root of 88428421 is about 9403.6387106269. The cubic root of 88428421 is about 445.5166679115.

The spelling of 88428421 in words is "eighty-eight million, four hundred twenty-eight thousand, four hundred twenty-one".