40297404420 has 864 divisors, whose sum is σ = 161505856512. Its totient is φ = 8253633024.

The previous prime is 40297404379. The next prime is 40297404431. The reversal of 40297404420 is 2440479204.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 247223259 + ... + 247223421.

Almost surely, 2^40297404420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40297404420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80752928256).

40297404420 is an abundant number, since it is smaller than the sum of its proper divisors (121208452092).

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

40297404420 is a wasteful number, since it uses less digits than its factorization.

40297404420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 40297404420 in words is "forty billion, two hundred ninety-seven million, four hundred four thousand, four hundred twenty".