40491828 has 72 divisors (see below), whose sum is σ = 113824256. Its totient is φ = 12052800.

The previous prime is 40491827. The next prime is 40491833. The reversal of 40491828 is 82819404.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 40491792 and 40491801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40491821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13113 + ... + 15903.

Almost surely, 2^40491828 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 40491828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56912128).

40491828 is an abundant number, since it is smaller than the sum of its proper divisors (73332428).

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

40491828 is a wasteful number, since it uses less digits than its factorization.

40491828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845 (or 2840 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 40491828 is about 6363.3189453303. The cubic root of 40491828 is about 343.3911734227.

The spelling of 40491828 in words is "forty million, four hundred ninety-one thousand, eight hundred twenty-eight".