28289777040 has 160 divisors (see below), whose sum is σ = 111362991360. Its totient is φ = 6466231296.

The previous prime is 28289777039. The next prime is 28289777069. The reversal of 28289777040 is 4077798282.

It is a super-2 number, since 2×28289777040² (a number of 22 digits) contains 22 as substring.

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).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 920389 + ... + 950628.

It is an arithmetic number, because the mean of its divisors is an integer number (696018696).

Almost surely, 2^28289777040 is an apocalyptic number.

28289777040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28289777040 is an abundant number, since it is smaller than the sum of its proper divisors (83073214320).

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

28289777040 is a wasteful number, since it uses less digits than its factorization.

28289777040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871046 (or 1871034 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 28289777040 in words is "twenty-eight billion, two hundred eighty-nine million, seven hundred seventy-seven thousand, forty".