40403290 has 16 divisors (see below), whose sum is σ = 72848160. Its totient is φ = 16134160.

The previous prime is 40403281. The next prime is 40403303. The reversal of 40403290 is 9230404.

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, 3525 + ... + 9655.

It is an arithmetic number, because the mean of its divisors is an integer number (4553010).

Almost surely, 2^40403290 is an apocalyptic number.

40403290 is a deficient number, since it is larger than the sum of its proper divisors (32444870).

40403290 is a wasteful number, since it uses less digits than its factorization.

40403290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6797.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40403290 is about 6356.3582340834. The cubic root of 40403290 is about 343.1407084468.

Adding to 40403290 its reverse (9230404), we get a palindrome (49633694).

The spelling of 40403290 in words is "forty million, four hundred three thousand, two hundred ninety".