40400136 has 96 divisors (see below), whose sum is σ = 126921600. Its totient is φ = 11370240.

The previous prime is 40400131. The next prime is 40400141. The reversal of 40400136 is 63100404.

It is an interprime number because it is at equal distance from previous prime (40400131) and next prime (40400141).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (40400131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35220 + ... + 36348.

It is an arithmetic number, because the mean of its divisors is an integer number (1322100).

Almost surely, 2^40400136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40400136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63460800).

40400136 is an abundant number, since it is smaller than the sum of its proper divisors (86521464).

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

40400136 is a wasteful number, since it uses less digits than its factorization.

40400136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40400136 is about 6356.1101312045. The cubic root of 40400136 is about 343.1317793558.

The spelling of 40400136 in words is "forty million, four hundred thousand, one hundred thirty-six".