40320780 has 48 divisors (see below), whose sum is σ = 113218560. Its totient is φ = 10721728.

The previous prime is 40320779. The next prime is 40320781. The reversal of 40320780 is 8702304.

It is an interprime number because it is at equal distance from previous prime (40320779) and next prime (40320781).

It is a self number, because there is not a number n which added to its sum of digits gives 40320780.

It is not an unprimeable number, because it can be changed into a prime (40320781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27301 + ... + 28739.

It is an arithmetic number, because the mean of its divisors is an integer number (2358720).

Almost surely, 2^40320780 is an apocalyptic number.

It is an amenable number.

40320780 is an abundant number, since it is smaller than the sum of its proper divisors (72897780).

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

40320780 is a wasteful number, since it uses less digits than its factorization.

40320780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 40320780 is about 6349.8645654848. The cubic root of 40320780 is about 342.9069664697.

The spelling of 40320780 in words is "forty million, three hundred twenty thousand, seven hundred eighty".