40947390 has 128 divisors (see below), whose sum is σ = 126282240. Its totient is φ = 9331200.

The previous prime is 40947377. The next prime is 40947421. The reversal of 40947390 is 9374904.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50085 + ... + 50895.

It is an arithmetic number, because the mean of its divisors is an integer number (986580).

Almost surely, 2^40947390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40947390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63141120).

40947390 is an abundant number, since it is smaller than the sum of its proper divisors (85334850).

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

40947390 is a wasteful number, since it uses less digits than its factorization.

40947390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 849 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 40947390 is about 6399.0147679154. The cubic root of 40947390 is about 344.6741725277.

The spelling of 40947390 in words is "forty million, nine hundred forty-seven thousand, three hundred ninety".