40278773388 has 24 divisors (see below), whose sum is σ = 107410062592. Its totient is φ = 11508220944.

The previous prime is 40278773371. The next prime is 40278773393. The reversal of 40278773388 is 88337787204.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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, 239754520 + ... + 239754687.

Almost surely, 2^40278773388 is an apocalyptic number.

It is an amenable number.

40278773388 is an abundant number, since it is smaller than the sum of its proper divisors (67131289204).

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

40278773388 is a wasteful number, since it uses less digits than its factorization.

40278773388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479509221 (or 479509219 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 57.

The spelling of 40278773388 in words is "forty billion, two hundred seventy-eight million, seven hundred seventy-three thousand, three hundred eighty-eight".