40370390172 has 96 divisors (see below), whose sum is σ = 119829696000. Its totient is φ = 11513788416.

The previous prime is 40370390167. The next prime is 40370390173. The reversal of 40370390172 is 27109307304.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40370390173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378204 + ... + 473052.

It is an arithmetic number, because the mean of its divisors is an integer number (1248226000).

Almost surely, 2^40370390172 is an apocalyptic number.

40370390172 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 40370390172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59914848000).

40370390172 is an abundant number, since it is smaller than the sum of its proper divisors (79459305828).

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

40370390172 is a wasteful number, since it uses less digits than its factorization.

40370390172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95432 (or 95424 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

Adding to 40370390172 its reverse (27109307304), we get a palindrome (67479697476).

The spelling of 40370390172 in words is "forty billion, three hundred seventy million, three hundred ninety thousand, one hundred seventy-two".