16231428 has 36 divisors (see below), whose sum is σ = 42551600. Its totient is φ = 5410152.

The previous prime is 16231427. The next prime is 16231441. The reversal of 16231428 is 82413261.

16231428 is a `hidden beast` number, since 1 + 6 + 231 + 428 = 666.

16231428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (16231427) 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, 7378 + ... + 9321.

Almost surely, 2^16231428 is an apocalyptic number.

16231428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16231428 is an abundant number, since it is smaller than the sum of its proper divisors (26320172).

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

16231428 is a wasteful number, since it uses less digits than its factorization.

16231428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16718 (or 16704 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 16231428 is about 4028.8246424981. The cubic root of 16231428 is about 253.1933198300.

Adding to 16231428 its reverse (82413261), we get a palindrome (98644689).

The spelling of 16231428 in words is "sixteen million, two hundred thirty-one thousand, four hundred twenty-eight".