40161894 has 8 divisors (see below), whose sum is σ = 80323800. Its totient is φ = 13387296.

The previous prime is 40161889. The next prime is 40161959. The reversal of 40161894 is 49816104.

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

40161894 is an admirable number.

It is a super-2 number, since 2×40161894² = 3225955459334472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3346819 + ... + 3346830.

It is an arithmetic number, because the mean of its divisors is an integer number (10040475).

Almost surely, 2^40161894 is an apocalyptic number.

40161894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40161894 is a wasteful number, since it uses less digits than its factorization.

40161894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6693654.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 40161894 is about 6337.3412406150. The cubic root of 40161894 is about 342.4559596702.

Adding to 40161894 its reverse (49816104), we get a palindrome (89977998).

The spelling of 40161894 in words is "forty million, one hundred sixty-one thousand, eight hundred ninety-four".