40213020 has 24 divisors (see below), whose sum is σ = 112596624. Its totient is φ = 10723456.

The previous prime is 40213001. The next prime is 40213021. The reversal of 40213020 is 2031204.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 40212987 and 40213005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40213021) 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, 335049 + ... + 335168.

It is an arithmetic number, because the mean of its divisors is an integer number (4691526).

Almost surely, 2^40213020 is an apocalyptic number.

It is an amenable number.

40213020 is an abundant number, since it is smaller than the sum of its proper divisors (72383604).

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

40213020 is a wasteful number, since it uses less digits than its factorization.

40213020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670229 (or 670227 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40213020 is about 6341.3736682205. The cubic root of 40213020 is about 342.6012132719.

Adding to 40213020 its reverse (2031204), we get a palindrome (42244224).

The spelling of 40213020 in words is "forty million, two hundred thirteen thousand, twenty".