40930640 has 20 divisors (see below), whose sum is σ = 95163924. Its totient is φ = 16372224.

The previous prime is 40930627. The next prime is 40930651. The reversal of 40930640 is 4603904.

It can be written as a sum of positive squares in 2 ways, for example, as 25969216 + 14961424 = 5096^2 + 3868^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255737 + ... + 255896.

Almost surely, 2^40930640 is an apocalyptic number.

40930640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40930640 is an abundant number, since it is smaller than the sum of its proper divisors (54233284).

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

40930640 is a wasteful number, since it uses less digits than its factorization.

40930640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511646 (or 511640 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 40930640 is about 6397.7058388144. The cubic root of 40930640 is about 344.6271684754.

The spelling of 40930640 in words is "forty million, nine hundred thirty thousand, six hundred forty".