28778413478 has 8 divisors (see below), whose sum is σ = 43563653760. Its totient is φ = 14257195560.

The previous prime is 28778413463. The next prime is 28778413493. The reversal of 28778413478 is 87431487782.

It is an interprime number because it is at equal distance from previous prime (28778413463) and next prime (28778413493).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66005318 + ... + 66005753.

It is an arithmetic number, because the mean of its divisors is an integer number (5445456720).

Almost surely, 2^28778413478 is an apocalyptic number.

28778413478 is a deficient number, since it is larger than the sum of its proper divisors (14785240282).

28778413478 is a wasteful number, since it uses less digits than its factorization.

28778413478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132011182.

The product of its digits is 16859136, while the sum is 59.

The spelling of 28778413478 in words is "twenty-eight billion, seven hundred seventy-eight million, four hundred thirteen thousand, four hundred seventy-eight".