40115790 has 128 divisors (see below), whose sum is σ = 125798400. Its totient is φ = 8968320.

The previous prime is 40115773. The next prime is 40115819. The reversal of 40115790 is 9751104.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38091 + ... + 39129.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^40115790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40115790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62899200).

40115790 is an abundant number, since it is smaller than the sum of its proper divisors (85682610).

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

40115790 is a wasteful number, since it uses less digits than its factorization.

40115790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 40115790 is about 6333.7027085268. The cubic root of 40115790 is about 342.3248682851.

Adding to 40115790 its reverse (9751104), we get a palindrome (49866894).

It can be divided in two parts, 4011 and 5790, that added together give a square (9801 = 99²).

The spelling of 40115790 in words is "forty million, one hundred fifteen thousand, seven hundred ninety".