40851540 has 120 divisors (see below), whose sum is σ = 129773952. Its totient is φ = 10756800.

The previous prime is 40851533. The next prime is 40851563. The reversal of 40851540 is 4515804.

40851540 is a `hidden beast` number, since 40 + 85 + 1 + 540 = 666.

40851540 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 (27).

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 244537 + ... + 244703.

Almost surely, 2^40851540 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 40851540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64886976).

40851540 is an abundant number, since it is smaller than the sum of its proper divisors (88922412).

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

40851540 is a wasteful number, since it uses less digits than its factorization.

40851540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 40851540 is about 6391.5209457531. The cubic root of 40851540 is about 344.4050236614.

It can be divided in two parts, 4085 and 1540, that added together give a square (5625 = 75²).

The spelling of 40851540 in words is "forty million, eight hundred fifty-one thousand, five hundred forty".