40097694 has 128 divisors (see below), whose sum is σ = 107347968. Its totient is φ = 9694080.

The previous prime is 40097693. The next prime is 40097719. The reversal of 40097694 is 49679004.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40097693) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 389247 + ... + 389349.

It is an arithmetic number, because the mean of its divisors is an integer number (838656).

Almost surely, 2^40097694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40097694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53673984).

40097694 is an abundant number, since it is smaller than the sum of its proper divisors (67250274).

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

40097694 is a wasteful number, since it uses less digits than its factorization.

40097694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 40097694 is about 6332.2739991254. The cubic root of 40097694 is about 342.2733869564.

The spelling of 40097694 in words is "forty million, ninety-seven thousand, six hundred ninety-four".