40904208 has 30 divisors (see below), whose sum is σ = 114475374. Its totient is φ = 13634688.

The previous prime is 40904197. The next prime is 40904219. The reversal of 40904208 is 80240904.

It is an interprime number because it is at equal distance from previous prime (40904197) and next prime (40904219).

It can be written as a sum of positive squares in only one way, i.e., 29289744 + 11614464 = 5412^2 + 3408^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141885 + ... + 142172.

Almost surely, 2^40904208 is an apocalyptic number.

40904208 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40904208 is an abundant number, since it is smaller than the sum of its proper divisors (73571166).

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

40904208 is a wasteful number, since it uses less digits than its factorization.

40904208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284071 (or 284062 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 40904208 is about 6395.6397647147. The cubic root of 40904208 is about 344.5529685863.

The spelling of 40904208 in words is "forty million, nine hundred four thousand, two hundred eight".