40312000 has 56 divisors (see below), whose sum is σ = 99852480. Its totient is φ = 16121600.

The previous prime is 40311991. The next prime is 40312003. The reversal of 40312000 is 21304.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (40312003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5481 + ... + 10519.

It is an arithmetic number, because the mean of its divisors is an integer number (1783080).

Almost surely, 2^40312000 is an apocalyptic number.

40312000 is a gapful number since it is divisible by the number (40) 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 40312000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49926240).

40312000 is an abundant number, since it is smaller than the sum of its proper divisors (59540480).

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

40312000 is an equidigital number, since it uses as much as digits as its factorization.

40312000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5066 (or 5046 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 40312000 is about 6349.1731745165. The cubic root of 40312000 is about 342.8820749065.

Adding to 40312000 its reverse (21304), we get a palindrome (40333304).

It can be divided in two parts, 403 and 12000, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 40312000 in words is "forty million, three hundred twelve thousand".