40261788 has 36 divisors (see below), whose sum is σ = 116312560. Its totient is φ = 11503296.

The previous prime is 40261783. The next prime is 40261789. The reversal of 40261788 is 88716204.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40261783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79633 + ... + 80136.

Almost surely, 2^40261788 is an apocalyptic number.

It is an amenable number.

40261788 is an abundant number, since it is smaller than the sum of its proper divisors (76050772).

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

40261788 is a wasteful number, since it uses less digits than its factorization.

40261788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159786 (or 159781 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 40261788 is about 6345.2177267608. The cubic root of 40261788 is about 342.7396528980.

The spelling of 40261788 in words is "forty million, two hundred sixty-one thousand, seven hundred eighty-eight".