40090720 has 48 divisors (see below), whose sum is σ = 95125968. Its totient is φ = 15966720.

The previous prime is 40090693. The next prime is 40090727. The reversal of 40090720 is 2709004.

It is a super-3 number, since 3×40090720³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40090691 and 40090700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40090727) 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, 52582 + ... + 53338.

It is an arithmetic number, because the mean of its divisors is an integer number (1981791).

Almost surely, 2^40090720 is an apocalyptic number.

40090720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40090720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47562984).

40090720 is an abundant number, since it is smaller than the sum of its proper divisors (55035248).

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

40090720 is a wasteful number, since it uses less digits than its factorization.

40090720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 40090720 is about 6331.7233041250. The cubic root of 40090720 is about 342.2535424818.

Adding to 40090720 its reverse (2709004), we get a palindrome (42799724).

The spelling of 40090720 in words is "forty million, ninety thousand, seven hundred twenty".