40125240 has 128 divisors (see below), whose sum is σ = 136468800. Its totient is φ = 10483200.

The previous prime is 40125229. The next prime is 40125259. The reversal of 40125240 is 4252104.

40125240 is a `hidden beast` number, since 401 + 25 + 240 = 666.

It is a super-2 number, since 2×40125240² = 3220069770115200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56890 + ... + 57590.

Almost surely, 2^40125240 is an apocalyptic number.

40125240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40125240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68234400).

40125240 is an abundant number, since it is smaller than the sum of its proper divisors (96343560).

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

40125240 is a wasteful number, since it uses less digits than its factorization.

40125240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40125240 is about 6334.4486737205. The cubic root of 40125240 is about 342.3517464464.

Adding to 40125240 its reverse (4252104), we get a palindrome (44377344).

The spelling of 40125240 in words is "forty million, one hundred twenty-five thousand, two hundred forty".