40015000 has 80 divisors (see below), whose sum is σ = 96156720. Its totient is φ = 15600000.

The previous prime is 40014977. The next prime is 40015049. The reversal of 40015000 is 51004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 264925 + ... + 265075.

It is an arithmetic number, because the mean of its divisors is an integer number (1201959).

Almost surely, 2^40015000 is an apocalyptic number.

40015000 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 40015000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48078360).

40015000 is an abundant number, since it is smaller than the sum of its proper divisors (56141720).

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

40015000 is a wasteful number, since it uses less digits than its factorization.

40015000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 40015000 is about 6325.7410633063. The cubic root of 40015000 is about 342.0379333914.

Adding to 40015000 its reverse (51004), we get a palindrome (40066004).

It can be divided in two parts, 400 and 15000, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 40015000 in words is "forty million, fifteen thousand".