28378409542 has 16 divisors (see below), whose sum is σ = 48650994720. Its totient is φ = 12161602368.

The previous prime is 28378409513. The next prime is 28378409551. The reversal of 28378409542 is 24590487382.

It is a self number, because there is not a number n which added to its sum of digits gives 28378409542.

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, 413584 + ... + 477292.

It is an arithmetic number, because the mean of its divisors is an integer number (3040687170).

Almost surely, 2^28378409542 is an apocalyptic number.

28378409542 is a deficient number, since it is larger than the sum of its proper divisors (20272585178).

28378409542 is a wasteful number, since it uses less digits than its factorization.

28378409542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95535.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 28378409542 in words is "twenty-eight billion, three hundred seventy-eight million, four hundred nine thousand, five hundred forty-two".