40398736 has 45 divisors (see below), whose sum is σ = 91454619. Its totient is φ = 17237472.

The previous prime is 40398733. The next prime is 40398751. The reversal of 40398736 is 63789304.

The square root of 40398736 is 6356.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40398733) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 177855 + ... + 178081.

Almost surely, 2^40398736 is an apocalyptic number.

40398736 is the 6356-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40398736

40398736 is an abundant number, since it is smaller than the sum of its proper divisors (51055883).

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

40398736 is an equidigital number, since it uses as much as digits as its factorization.

40398736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The cubic root of 40398736 is about 343.1278157550.

The spelling of 40398736 in words is "forty million, three hundred ninety-eight thousand, seven hundred thirty-six".