40172382 has 16 divisors (see below), whose sum is σ = 89272080. Its totient is φ = 13390776.

The previous prime is 40172381. The next prime is 40172383. The reversal of 40172382 is 28327104.

It is an interprime number because it is at equal distance from previous prime (40172381) and next prime (40172383).

It is a super-2 number, since 2×40172382² = 3227640551107848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40172381) 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, 371913 + ... + 372020.

It is an arithmetic number, because the mean of its divisors is an integer number (5579505).

Almost surely, 2^40172382 is an apocalyptic number.

40172382 is an abundant number, since it is smaller than the sum of its proper divisors (49099698).

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

40172382 is a wasteful number, since it uses less digits than its factorization.

40172382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743944 (or 743938 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 40172382 is about 6338.1686629499. The cubic root of 40172382 is about 342.4857670751.

Adding to 40172382 its reverse (28327104), we get a palindrome (68499486).

The spelling of 40172382 in words is "forty million, one hundred seventy-two thousand, three hundred eighty-two".