40213280 has 48 divisors (see below), whose sum is σ = 95800320. Its totient is φ = 15950592.

The previous prime is 40213259. The next prime is 40213297. The reversal of 40213280 is 8231204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19331 + ... + 21309.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^40213280 is an apocalyptic number.

40213280 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 40213280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47900160).

40213280 is an abundant number, since it is smaller than the sum of its proper divisors (55587040).

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

40213280 is a wasteful number, since it uses less digits than its factorization.

40213280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 40213280 is about 6341.3941684775. The cubic root of 40213280 is about 342.6019516407.

Adding to 40213280 its reverse (8231204), we get a palindrome (48444484).

The spelling of 40213280 in words is "forty million, two hundred thirteen thousand, two hundred eighty".