40381888 has 14 divisors (see below), whose sum is σ = 80132936. Its totient is φ = 20190912.

The previous prime is 40381879. The next prime is 40381927. The reversal of 40381888 is 88818304.

It is a self number, because there is not a number n which added to its sum of digits gives 40381888.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315420 + ... + 315547.

Almost surely, 2^40381888 is an apocalyptic number.

It is an amenable number.

40381888 is a deficient number, since it is larger than the sum of its proper divisors (39751048).

40381888 is an equidigital number, since it uses as much as digits as its factorization.

40381888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630979 (or 630969 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 40381888 is about 6354.6744999252. The cubic root of 40381888 is about 343.0801094664.

The spelling of 40381888 in words is "forty million, three hundred eighty-one thousand, eight hundred eighty-eight".