40591698 has 48 divisors (see below), whose sum is σ = 95442624. Its totient is φ = 11474400.

The previous prime is 40591697. The next prime is 40591703. The reversal of 40591698 is 89619504.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (40591697) 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, 29011 + ... + 30377.

It is an arithmetic number, because the mean of its divisors is an integer number (1988388).

Almost surely, 2^40591698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40591698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47721312).

40591698 is an abundant number, since it is smaller than the sum of its proper divisors (54850926).

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

40591698 is a wasteful number, since it uses less digits than its factorization.

40591698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487 (or 1480 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 40591698 is about 6371.1614325804. The cubic root of 40591698 is about 343.6732576674.

The spelling of 40591698 in words is "forty million, five hundred ninety-one thousand, six hundred ninety-eight".