40321616 has 40 divisors (see below), whose sum is σ = 80857920. Its totient is φ = 19466496.

The previous prime is 40321613. The next prime is 40321621. The reversal of 40321616 is 61612304.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40321591 and 40321600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40321613) 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, 70580 + ... + 71148.

It is an arithmetic number, because the mean of its divisors is an integer number (2021448).

Almost surely, 2^40321616 is an apocalyptic number.

It is an amenable number.

40321616 is an abundant number, since it is smaller than the sum of its proper divisors (40536304).

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

40321616 is a wasteful number, since it uses less digits than its factorization.

40321616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40321616 is about 6349.9303933193. The cubic root of 40321616 is about 342.9093363663.

The spelling of 40321616 in words is "forty million, three hundred twenty-one thousand, six hundred sixteen".