28742138430 has 16 divisors (see below), whose sum is σ = 68981132304. Its totient is φ = 7664570240.

The previous prime is 28742138407. The next prime is 28742138441. The reversal of 28742138430 is 3483124782.

It is a happy number.

It is a super-2 number, since 2×28742138430² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479035611 + ... + 479035670.

It is an arithmetic number, because the mean of its divisors is an integer number (4311320769).

Almost surely, 2^28742138430 is an apocalyptic number.

28742138430 is an abundant number, since it is smaller than the sum of its proper divisors (40238993874).

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

28742138430 is a wasteful number, since it uses less digits than its factorization.

28742138430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958071291.

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 28742138430 in words is "twenty-eight billion, seven hundred forty-two million, one hundred thirty-eight thousand, four hundred thirty".