15440228454 has 64 divisors (see below), whose sum is σ = 35615932416. Its totient is φ = 4371089184.

The previous prime is 15440228443. The next prime is 15440228473. The reversal of 15440228454 is 45482204451.

15440228454 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15440228454² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5796727 + ... + 5799389.

It is an arithmetic number, because the mean of its divisors is an integer number (556498944).

Almost surely, 2^15440228454 is an apocalyptic number.

15440228454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

15440228454 is an abundant number, since it is smaller than the sum of its proper divisors (20175703962).

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

15440228454 is a wasteful number, since it uses less digits than its factorization.

15440228454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889.

The product of its (nonzero) digits is 204800, while the sum is 39.

The spelling of 15440228454 in words is "fifteen billion, four hundred forty million, two hundred twenty-eight thousand, four hundred fifty-four".