40265988 has 24 divisors (see below), whose sum is σ = 107376192. Its totient is φ = 11504544.

The previous prime is 40265983. The next prime is 40265999. The reversal of 40265988 is 88956204.

It is a super-2 number, since 2×40265988² = 3242699579232288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (40265983) 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, 239595 + ... + 239762.

It is an arithmetic number, because the mean of its divisors is an integer number (4474008).

Almost surely, 2^40265988 is an apocalyptic number.

It is an amenable number.

40265988 is an abundant number, since it is smaller than the sum of its proper divisors (67110204).

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

40265988 is a wasteful number, since it uses less digits than its factorization.

40265988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479371 (or 479369 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 40265988 is about 6345.5486760406. The cubic root of 40265988 is about 342.7515703725.

The spelling of 40265988 in words is "forty million, two hundred sixty-five thousand, nine hundred eighty-eight".