40251330 has 160 divisors (see below), whose sum is σ = 128240640. Its totient is φ = 8864640.

The previous prime is 40251319. The next prime is 40251353. The reversal of 40251330 is 3315204.

40251330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 175656 + ... + 175884.

It is an arithmetic number, because the mean of its divisors is an integer number (801504).

Almost surely, 2^40251330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40251330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64120320).

40251330 is an abundant number, since it is smaller than the sum of its proper divisors (87989310).

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

40251330 is a wasteful number, since it uses less digits than its factorization.

40251330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 40251330 is about 6344.3935880429. The cubic root of 40251330 is about 342.7099747850.

Adding to 40251330 its reverse (3315204), we get a palindrome (43566534).

The spelling of 40251330 in words is "forty million, two hundred fifty-one thousand, three hundred thirty".