40305870 has 128 divisors (see below), whose sum is σ = 120476160. Its totient is φ = 9504000.

The previous prime is 40305851. The next prime is 40305871. The reversal of 40305870 is 7850304.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40305871) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 121605 + ... + 121935.

It is an arithmetic number, because the mean of its divisors is an integer number (941220).

Almost surely, 2^40305870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40305870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60238080).

40305870 is an abundant number, since it is smaller than the sum of its proper divisors (80170290).

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

40305870 is a wasteful number, since it uses less digits than its factorization.

40305870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 40305870 is about 6348.6904161410. The cubic root of 40305870 is about 342.8646940301.

The spelling of 40305870 in words is "forty million, three hundred five thousand, eight hundred seventy".