40542292 has 48 divisors (see below), whose sum is σ = 83894272. Its totient is φ = 16783200.

The previous prime is 40542289. The next prime is 40542301. The reversal of 40542292 is 29224504.

It is a super-2 number, since 2×40542292² = 3287354881226528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 40542292.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181693 + ... + 181915.

Almost surely, 2^40542292 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 40542292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41947136).

40542292 is an abundant number, since it is smaller than the sum of its proper divisors (43351980).

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

40542292 is a wasteful number, since it uses less digits than its factorization.

40542292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 40542292 is about 6367.2829370148. The cubic root of 40542292 is about 343.5337676131.

Adding to 40542292 its reverse (29224504), we get a palindrome (69766796).

The spelling of 40542292 in words is "forty million, five hundred forty-two thousand, two hundred ninety-two".