40184940 has 48 divisors (see below), whose sum is σ = 119139552. Its totient is φ = 10085376.

The previous prime is 40184929. The next prime is 40184941. The reversal of 40184940 is 4948104.

It is a super-2 number, since 2×40184940² = 3229658805607200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 40184898 and 40184907.

It is not an unprimeable number, because it can be changed into a prime (40184941) 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, 18679 + ... + 20718.

It is an arithmetic number, because the mean of its divisors is an integer number (2482074).

Almost surely, 2^40184940 is an apocalyptic number.

It is an amenable number.

40184940 is an abundant number, since it is smaller than the sum of its proper divisors (78954612).

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

40184940 is a wasteful number, since it uses less digits than its factorization.

40184940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39426 (or 39424 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 40184940 is about 6339.1592502476. The cubic root of 40184940 is about 342.5214506962.

The spelling of 40184940 in words is "forty million, one hundred eighty-four thousand, nine hundred forty".