40215442428 has 144 divisors (see below), whose sum is σ = 119847995904. Its totient is φ = 11132795520.

The previous prime is 40215442373. The next prime is 40215442433. The reversal of 40215442428 is 82424451204.

40215442428 is a `hidden beast` number, since 40 + 2 + 154 + 42 + 428 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 40215442392 and 40215442401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1010401 + ... + 1049447.

Almost surely, 2^40215442428 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 40215442428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59923997952).

40215442428 is an abundant number, since it is smaller than the sum of its proper divisors (79632553476).

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

40215442428 is a wasteful number, since it uses less digits than its factorization.

40215442428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39192 (or 39187 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 36.

The spelling of 40215442428 in words is "forty billion, two hundred fifteen million, four hundred forty-two thousand, four hundred twenty-eight".