40297194528 has 144 divisors (see below), whose sum is σ = 114321969216. Its totient is φ = 12404761600.

The previous prime is 40297194527. The next prime is 40297194541. The reversal of 40297194528 is 82549179204.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (40297194521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1846078 + ... + 1867778.

It is an arithmetic number, because the mean of its divisors is an integer number (793902564).

Almost surely, 2^40297194528 is an apocalyptic number.

40297194528 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40297194528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57160984608).

40297194528 is an abundant number, since it is smaller than the sum of its proper divisors (74024774688).

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

40297194528 is a wasteful number, since it uses less digits than its factorization.

40297194528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21795 (or 21758 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 40297194528 in words is "forty billion, two hundred ninety-seven million, one hundred ninety-four thousand, five hundred twenty-eight".