40640754 has 64 divisors (see below), whose sum is σ = 102316032. Its totient is φ = 10541520.

The previous prime is 40640741. The next prime is 40640767. The reversal of 40640754 is 45704604.

It is an interprime number because it is at equal distance from previous prime (40640741) and next prime (40640767).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55539 + ... + 56265.

It is an arithmetic number, because the mean of its divisors is an integer number (1598688).

Almost surely, 2^40640754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40640754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51158016).

40640754 is an abundant number, since it is smaller than the sum of its proper divisors (61675278).

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

40640754 is a wasteful number, since it uses less digits than its factorization.

40640754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 40640754 is about 6375.0101176390. The cubic root of 40640754 is about 343.8116476102.

The spelling of 40640754 in words is "forty million, six hundred forty thousand, seven hundred fifty-four".