28662990040 has 32 divisors (see below), whose sum is σ = 64497429360. Its totient is φ = 11464182400.

The previous prime is 28662990023. The next prime is 28662990047. The reversal of 28662990040 is 4009926682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28662990047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565335 + ... + 613945.

Almost surely, 2^28662990040 is an apocalyptic number.

28662990040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28662990040 is an abundant number, since it is smaller than the sum of its proper divisors (35834439320).

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

28662990040 is a wasteful number, since it uses less digits than its factorization.

28662990040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63363 (or 63359 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 28662990040 in words is "twenty-eight billion, six hundred sixty-two million, nine hundred ninety thousand, forty".