47772540 has 36 divisors (see below), whose sum is σ = 144910584. Its totient is φ = 12739296.

The previous prime is 47772497. The next prime is 47772547. The reversal of 47772540 is 4527774.

It is a happy number.

47772540 is a `hidden beast` number, since 47 + 7 + 72 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 47772495 and 47772504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47772547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132522 + ... + 132881.

It is an arithmetic number, because the mean of its divisors is an integer number (4025294).

Almost surely, 2^47772540 is an apocalyptic number.

It is an amenable number.

47772540 is an abundant number, since it is smaller than the sum of its proper divisors (97138044).

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

47772540 is a wasteful number, since it uses less digits than its factorization.

47772540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265418 (or 265413 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 47772540 is about 6911.7682252807. The cubic root of 47772540 is about 362.8491507175.

The spelling of 47772540 in words is "forty-seven million, seven hundred seventy-two thousand, five hundred forty".