40090028 has 24 divisors (see below), whose sum is σ = 77837760. Its totient is φ = 17912720.

The previous prime is 40090021. The next prime is 40090049. The reversal of 40090028 is 82009004.

It is a junction number, because it is equal to n+sod(n) for n = 40089985 and 40090012.

It is not an unprimeable number, because it can be changed into a prime (40090021) 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, 5126 + ... + 10317.

It is an arithmetic number, because the mean of its divisors is an integer number (3243240).

Almost surely, 2^40090028 is an apocalyptic number.

It is an amenable number.

40090028 is a deficient number, since it is larger than the sum of its proper divisors (37747732).

40090028 is a wasteful number, since it uses less digits than its factorization.

40090028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15517 (or 15515 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 40090028 is about 6331.6686584186. The cubic root of 40090028 is about 342.2515732745.

The spelling of 40090028 in words is "forty million, ninety thousand, twenty-eight".