47640390 has 64 divisors (see below), whose sum is σ = 132848640. Its totient is φ = 10707840.

The previous prime is 47640389. The next prime is 47640419. The reversal of 47640390 is 9304674.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10951 + ... + 14669.

It is an arithmetic number, because the mean of its divisors is an integer number (2075760).

Almost surely, 2^47640390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47640390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66424320).

47640390 is an abundant number, since it is smaller than the sum of its proper divisors (85208250).

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

47640390 is a wasteful number, since it uses less digits than its factorization.

47640390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 47640390 is about 6902.2018226070. The cubic root of 47640390 is about 362.5142665808.

The spelling of 47640390 in words is "forty-seven million, six hundred forty thousand, three hundred ninety".