40400032420 has 48 divisors (see below), whose sum is σ = 92734891200. Its totient is φ = 14662017920.

The previous prime is 40400032417. The next prime is 40400032433. The reversal of 40400032420 is 2423000404.

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, 68410 + ... + 292369.

It is an arithmetic number, because the mean of its divisors is an integer number (1931976900).

Almost surely, 2^40400032420 is an apocalyptic number.

It is an amenable number.

40400032420 is an abundant number, since it is smaller than the sum of its proper divisors (52334858780).

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

40400032420 is a wasteful number, since it uses less digits than its factorization.

40400032420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361308 (or 361306 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 40400032420 its reverse (2423000404), we get a palindrome (42823032824).

The spelling of 40400032420 in words is "forty billion, four hundred million, thirty-two thousand, four hundred twenty".