40623840 has 72 divisors (see below), whose sum is σ = 138633768. Its totient is φ = 10832640.

The previous prime is 40623827. The next prime is 40623841. The reversal of 40623840 is 4832604.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40623841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12666 + ... + 15545.

It is an arithmetic number, because the mean of its divisors is an integer number (1925469).

Almost surely, 2^40623840 is an apocalyptic number.

40623840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40623840 is an abundant number, since it is smaller than the sum of its proper divisors (98009928).

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

40623840 is a wasteful number, since it uses less digits than its factorization.

40623840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28232 (or 28221 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 40623840 is about 6373.6833934547. The cubic root of 40623840 is about 343.7639447787.

The spelling of 40623840 in words is "forty million, six hundred twenty-three thousand, eight hundred forty".