40169397 has 8 divisors (see below), whose sum is σ = 55287040. Its totient is φ = 25915680.

The previous prime is 40169377. The next prime is 40169399. The reversal of 40169397 is 79396104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40169397 - 2⁶ = 40169333 is a prime.

It is a super-2 number, since 2×40169397² = 3227160910687218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40169399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215872 + ... + 216057.

It is an arithmetic number, because the mean of its divisors is an integer number (6910880).

Almost surely, 2^40169397 is an apocalyptic number.

It is an amenable number.

40169397 is a deficient number, since it is larger than the sum of its proper divisors (15117643).

40169397 is a wasteful number, since it uses less digits than its factorization.

40169397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431963.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 40169397 is about 6337.9331804619. The cubic root of 40169397 is about 342.4772840885.

The spelling of 40169397 in words is "forty million, one hundred sixty-nine thousand, three hundred ninety-seven".