40487720 has 128 divisors (see below), whose sum is σ = 114912000. Its totient is φ = 12757248.

The previous prime is 40487701. The next prime is 40487729. The reversal of 40487720 is 2778404.

It is not an unprimeable number, because it can be changed into a prime (40487729) 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, 178247 + ... + 178473.

It is an arithmetic number, because the mean of its divisors is an integer number (897750).

Almost surely, 2^40487720 is an apocalyptic number.

40487720 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 40487720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57456000).

40487720 is an abundant number, since it is smaller than the sum of its proper divisors (74424280).

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

40487720 is a wasteful number, since it uses less digits than its factorization.

40487720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 40487720 is about 6362.9961496138. The cubic root of 40487720 is about 343.3795603910.

The spelling of 40487720 in words is "forty million, four hundred eighty-seven thousand, seven hundred twenty".