40255690 has 16 divisors (see below), whose sum is σ = 72534528. Its totient is φ = 16085776.

The previous prime is 40255687. The next prime is 40255703. The reversal of 40255690 is 9655204.

It is a super-2 number, since 2×40255690² = 3241041154752200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14559 + ... + 17101.

It is an arithmetic number, because the mean of its divisors is an integer number (4533408).

Almost surely, 2^40255690 is an apocalyptic number.

40255690 is a deficient number, since it is larger than the sum of its proper divisors (32278838).

40255690 is a wasteful number, since it uses less digits than its factorization.

40255690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 40255690 is about 6344.7371891986. The cubic root of 40255690 is about 342.7223483848.

The spelling of 40255690 in words is "forty million, two hundred fifty-five thousand, six hundred ninety".