40138692 has 24 divisors (see below), whose sum is σ = 102171552. Its totient is φ = 12163200.

The previous prime is 40138687. The next prime is 40138699. The reversal of 40138692 is 29683104.

40138692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40138692² = 3222229190941728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (40138699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151909 + ... + 152172.

It is an arithmetic number, because the mean of its divisors is an integer number (4257148).

Almost surely, 2^40138692 is an apocalyptic number.

It is an amenable number.

40138692 is an abundant number, since it is smaller than the sum of its proper divisors (62032860).

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

40138692 is a wasteful number, since it uses less digits than its factorization.

40138692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304099 (or 304097 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 40138692 is about 6335.5103977501. The cubic root of 40138692 is about 342.3900000173.

It can be divided in two parts, 401 and 38692, that added together give a palindrome (39093).

The spelling of 40138692 in words is "forty million, one hundred thirty-eight thousand, six hundred ninety-two".