47251440 has 240 divisors, whose sum is σ = 171774720. Its totient is φ = 11612160.

The previous prime is 47251433. The next prime is 47251447. The reversal of 47251440 is 4415274.

It is an interprime number because it is at equal distance from previous prime (47251433) and next prime (47251447).

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47251447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 647244 + ... + 647316.

It is an arithmetic number, because the mean of its divisors is an integer number (715728).

Almost surely, 2^47251440 is an apocalyptic number.

47251440 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 47251440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85887360).

47251440 is an abundant number, since it is smaller than the sum of its proper divisors (124523280).

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

47251440 is a wasteful number, since it uses less digits than its factorization.

47251440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 47251440 is about 6873.9682862230. The cubic root of 47251440 is about 361.5250121867.

The spelling of 47251440 in words is "forty-seven million, two hundred fifty-one thousand, four hundred forty".