40247172 has 96 divisors (see below), whose sum is σ = 120422400. Its totient is φ = 11386656.

The previous prime is 40247161. The next prime is 40247191. The reversal of 40247172 is 27174204.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104893 + ... + 105275.

It is an arithmetic number, because the mean of its divisors is an integer number (1254400).

Almost surely, 2^40247172 is an apocalyptic number.

40247172 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40247172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60211200).

40247172 is an abundant number, since it is smaller than the sum of its proper divisors (80175228).

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

40247172 is a wasteful number, since it uses less digits than its factorization.

40247172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 40247172 is about 6344.0658886868. The cubic root of 40247172 is about 342.6981736251.

It can be divided in two parts, 402 and 47172, that added together give a palindrome (47574).

The spelling of 40247172 in words is "forty million, two hundred forty-seven thousand, one hundred seventy-two".