40321020 has 48 divisors (see below), whose sum is σ = 116796960. Its totient is φ = 10381056.

The previous prime is 40321019. The next prime is 40321031. The reversal of 40321020 is 2012304.

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 = 40320987 and 40321005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9847 + ... + 13326.

It is an arithmetic number, because the mean of its divisors is an integer number (2433270).

Almost surely, 2^40321020 is an apocalyptic number.

It is an amenable number.

40321020 is an abundant number, since it is smaller than the sum of its proper divisors (76475940).

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

40321020 is a wasteful number, since it uses less digits than its factorization.

40321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23214 (or 23212 counting only the distinct ones).

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

The square root of 40321020 is about 6349.8834634976. The cubic root of 40321020 is about 342.9076468261.

Adding to 40321020 its reverse (2012304), we get a palindrome (42333324).

The spelling of 40321020 in words is "forty million, three hundred twenty-one thousand, twenty".