40090036 has 36 divisors (see below), whose sum is σ = 82262628. Its totient is φ = 17044608.

The previous prime is 40090021. The next prime is 40090049. The reversal of 40090036 is 63009004.

It can be written as a sum of positive squares in 2 ways, for example, as 29811600 + 10278436 = 5460^2 + 3206^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40089989 and 40090016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26106 + ... + 27598.

It is an arithmetic number, because the mean of its divisors is an integer number (2285073).

Almost surely, 2^40090036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40090036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41131314).

40090036 is an abundant number, since it is smaller than the sum of its proper divisors (42172592).

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

40090036 is a wasteful number, since it uses less digits than its factorization.

40090036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 40090036 is about 6331.6692901635. The cubic root of 40090036 is about 342.2515960401.

The spelling of 40090036 in words is "forty million, ninety thousand, thirty-six".