40099780 has 24 divisors (see below), whose sum is σ = 96239808. Its totient is φ = 13748448.

The previous prime is 40099757. The next prime is 40099781. The reversal of 40099780 is 8799004.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40099781) 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, 143074 + ... + 143353.

It is an arithmetic number, because the mean of its divisors is an integer number (4009992).

Almost surely, 2^40099780 is an apocalyptic number.

It is an amenable number.

40099780 is an abundant number, since it is smaller than the sum of its proper divisors (56140028).

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

40099780 is a wasteful number, since it uses less digits than its factorization.

40099780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286443 (or 286441 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 40099780 is about 6332.4387087440. The cubic root of 40099780 is about 342.2793222096.

The spelling of 40099780 in words is "forty million, ninety-nine thousand, seven hundred eighty".