28451535461238 has 64 divisors (see below), whose sum is σ = 63426713264640. Its totient is φ = 8455472727552.

The previous prime is 28451535461231. The next prime is 28451535461269. The reversal of 28451535461238 is 83216453515482.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28451535461231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22658220 + ... + 23880912.

It is an arithmetic number, because the mean of its divisors is an integer number (991042394760).

Almost surely, 2^{28451535461238} is an apocalyptic number.

28451535461238 is an abundant number, since it is smaller than the sum of its proper divisors (34975177803402).

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

28451535461238 is a wasteful number, since it uses less digits than its factorization.

28451535461238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234741.

The product of its digits is 27648000, while the sum is 57.

The spelling of 28451535461238 in words is "twenty-eight trillion, four hundred fifty-one billion, five hundred thirty-five million, four hundred sixty-one thousand, two hundred thirty-eight".