40428790 has 16 divisors (see below), whose sum is σ = 74739312. Its totient is φ = 15734304.

The previous prime is 40428769. The next prime is 40428793. The reversal of 40428790 is 9782404.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40428793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54264 + ... + 55003.

It is an arithmetic number, because the mean of its divisors is an integer number (4671207).

Almost surely, 2^40428790 is an apocalyptic number.

40428790 is a deficient number, since it is larger than the sum of its proper divisors (34310522).

40428790 is a wasteful number, since it uses less digits than its factorization.

40428790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109311.

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

The square root of 40428790 is about 6358.3637832386. The cubic root of 40428790 is about 343.2128828323.

The spelling of 40428790 in words is "forty million, four hundred twenty-eight thousand, seven hundred ninety".