40821380 has 24 divisors (see below), whose sum is σ = 87550848. Its totient is φ = 15980768.

The previous prime is 40821359. The next prime is 40821401. The reversal of 40821380 is 8312804.

It is an interprime number because it is at equal distance from previous prime (40821359) and next prime (40821401).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20774 + ... + 22653.

It is an arithmetic number, because the mean of its divisors is an integer number (3647952).

Almost surely, 2^40821380 is an apocalyptic number.

It is an amenable number.

40821380 is an abundant number, since it is smaller than the sum of its proper divisors (46729468).

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

40821380 is a wasteful number, since it uses less digits than its factorization.

40821380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43483 (or 43481 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 40821380 is about 6389.1611342961. The cubic root of 40821380 is about 344.3202466631.

The spelling of 40821380 in words is "forty million, eight hundred twenty-one thousand, three hundred eighty".