40213040 has 40 divisors (see below), whose sum is σ = 106853280. Its totient is φ = 13787136.

The previous prime is 40213027. The next prime is 40213057. The reversal of 40213040 is 4031204.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 35345 + ... + 36464.

It is an arithmetic number, because the mean of its divisors is an integer number (2671332).

Almost surely, 2^40213040 is an apocalyptic number.

40213040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40213040 is an abundant number, since it is smaller than the sum of its proper divisors (66640240).

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

40213040 is a wasteful number, since it uses less digits than its factorization.

40213040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71829 (or 71823 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 40213040 is about 6341.3752451657. The cubic root of 40213040 is about 342.6012700696.

Adding to 40213040 its reverse (4031204), we get a palindrome (44244244).

The spelling of 40213040 in words is "forty million, two hundred thirteen thousand, forty".