40890825 has 72 divisors (see below), whose sum is σ = 77995008. Its totient is φ = 21228480.

The previous prime is 40890823. The next prime is 40890833. The reversal of 40890825 is 52809804.

It is not a de Polignac number, because 40890825 - 2¹ = 40890823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40890825.

It is not an unprimeable number, because it can be changed into a prime (40890823) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 321912 + ... + 322038.

It is an arithmetic number, because the mean of its divisors is an integer number (1083264).

Almost surely, 2^40890825 is an apocalyptic number.

40890825 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40890825 is a deficient number, since it is larger than the sum of its proper divisors (37104183).

40890825 is a wasteful number, since it uses less digits than its factorization.

40890825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 40890825 is about 6394.5934194443. The cubic root of 40890825 is about 344.5153876495.

The spelling of 40890825 in words is "forty million, eight hundred ninety thousand, eight hundred twenty-five".