47428440 has 64 divisors (see below), whose sum is σ = 144115200. Its totient is φ = 12484992.

The previous prime is 47428421. The next prime is 47428457. The reversal of 47428440 is 4482474.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6979 + ... + 11981.

It is an arithmetic number, because the mean of its divisors is an integer number (2251800).

Almost surely, 2^47428440 is an apocalyptic number.

47428440 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 47428440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72057600).

47428440 is an abundant number, since it is smaller than the sum of its proper divisors (96686760).

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

47428440 is a wasteful number, since it uses less digits than its factorization.

47428440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096 (or 5092 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 33.

The square root of 47428440 is about 6886.8309112392. The cubic root of 47428440 is about 361.9758640034.

The spelling of 47428440 in words is "forty-seven million, four hundred twenty-eight thousand, four hundred forty".