40102452 has 60 divisors (see below), whose sum is σ = 112911876. Its totient is φ = 12337920.

The previous prime is 40102441. The next prime is 40102453. The reversal of 40102452 is 25420104.

40102452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11329956 + 28772496 = 3366^2 + 5364^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40102453) 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 19 ways as a sum of consecutive naturals, for example, 549 + ... + 8972.

Almost surely, 2^40102452 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 40102452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56455938).

40102452 is an abundant number, since it is smaller than the sum of its proper divisors (72809424).

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

40102452 is a wasteful number, since it uses less digits than its factorization.

40102452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9550 (or 9539 counting only the distinct ones).

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

The square root of 40102452 is about 6332.6496823999. The cubic root of 40102452 is about 342.2869244960.

Adding to 40102452 its reverse (25420104), we get a palindrome (65522556).

The spelling of 40102452 in words is "forty million, one hundred two thousand, four hundred fifty-two".