40828640 has 24 divisors (see below), whose sum is σ = 96458040. Its totient is φ = 16331392.

The previous prime is 40828637. The next prime is 40828673. The reversal of 40828640 is 4682804.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 40828597 and 40828606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127430 + ... + 127749.

It is an arithmetic number, because the mean of its divisors is an integer number (4019085).

Almost surely, 2^40828640 is an apocalyptic number.

40828640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40828640 is an abundant number, since it is smaller than the sum of its proper divisors (55629400).

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

40828640 is a wasteful number, since it uses less digits than its factorization.

40828640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255194 (or 255186 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 40828640 is about 6389.7292587402. The cubic root of 40828640 is about 344.3406576733.

The spelling of 40828640 in words is "forty million, eight hundred twenty-eight thousand, six hundred forty".