28778222462 has 16 divisors (see below), whose sum is σ = 47096262000. Its totient is φ = 13079725440.

The previous prime is 28778222411. The next prime is 28778222477. The reversal of 28778222462 is 26422287782.

It is a super-2 number, since 2×28778222462² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28778222462.

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, 186614 + ... + 303942.

It is an arithmetic number, because the mean of its divisors is an integer number (2943516375).

Almost surely, 2^28778222462 is an apocalyptic number.

28778222462 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28778222462 is a deficient number, since it is larger than the sum of its proper divisors (18318039538).

28778222462 is a wasteful number, since it uses less digits than its factorization.

28778222462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128491.

The product of its digits is 2408448, while the sum is 50.

The spelling of 28778222462 in words is "twenty-eight billion, seven hundred seventy-eight million, two hundred twenty-two thousand, four hundred sixty-two".