40591738 has 32 divisors (see below), whose sum is σ = 69735168. Its totient is φ = 17553600.

The previous prime is 40591729. The next prime is 40591739. The reversal of 40591738 is 83719504.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 40591697 and 40591706.

It is not an unprimeable number, because it can be changed into a prime (40591739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37728 + ... + 38788.

It is an arithmetic number, because the mean of its divisors is an integer number (2179224).

Almost surely, 2^40591738 is an apocalyptic number.

40591738 is a deficient number, since it is larger than the sum of its proper divisors (29143430).

40591738 is a wasteful number, since it uses less digits than its factorization.

40591738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 40591738 is about 6371.1645717247. The cubic root of 40591738 is about 343.6733705552.

The spelling of 40591738 in words is "forty million, five hundred ninety-one thousand, seven hundred thirty-eight".