40290784 has 12 divisors (see below), whose sum is σ = 79322544. Its totient is φ = 20145376.

The previous prime is 40290769. The next prime is 40290827. The reversal of 40290784 is 48709204.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629512 + ... + 629575.

It is an arithmetic number, because the mean of its divisors is an integer number (6610212).

Almost surely, 2^40290784 is an apocalyptic number.

It is an amenable number.

40290784 is a deficient number, since it is larger than the sum of its proper divisors (39031760).

40290784 is a wasteful number, since it uses less digits than its factorization.

40290784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259097 (or 1259089 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 40290784 is about 6347.5021858996. The cubic root of 40290784 is about 342.8219119884.

Adding to 40290784 its reverse (48709204), we get a palindrome (88999988).

The spelling of 40290784 in words is "forty million, two hundred ninety thousand, seven hundred eighty-four".