15428366838 has 16 divisors (see below), whose sum is σ = 34285259760. Its totient is φ = 5142788928.

The previous prime is 15428366831. The next prime is 15428366861. The reversal of 15428366838 is 83866382451.

15428366838 is a `hidden beast` number, since 1 + 542 + 8 + 3 + 6 + 68 + 38 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 285710497 = 15428366838 / (1 + 5 + 4 + 2 + 8 + 3 + 6 + 6 + 8 + 3 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15428366831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142855195 + ... + 142855302.

It is an arithmetic number, because the mean of its divisors is an integer number (2142828735).

Almost surely, 2^15428366838 is an apocalyptic number.

15428366838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

15428366838 is an abundant number, since it is smaller than the sum of its proper divisors (18856892922).

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

15428366838 is a wasteful number, since it uses less digits than its factorization.

15428366838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285710508 (or 285710502 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 15428366838 in words is "fifteen billion, four hundred twenty-eight million, three hundred sixty-six thousand, eight hundred thirty-eight".