47640254 has 4 divisors (see below), whose sum is σ = 71460384. Its totient is φ = 23820126.

The previous prime is 47640251. The next prime is 47640287. The reversal of 47640254 is 45204674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45204674 = 2 ⋅22602337.

It is a self number, because there is not a number n which added to its sum of digits gives 47640254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47640251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11910062 + ... + 11910065.

It is an arithmetic number, because the mean of its divisors is an integer number (17865096).

Almost surely, 2^47640254 is an apocalyptic number.

47640254 is a deficient number, since it is larger than the sum of its proper divisors (23820130).

47640254 is a wasteful number, since it uses less digits than its factorization.

47640254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23820129.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 47640254 is about 6902.1919706713. The cubic root of 47640254 is about 362.5139216215.

The spelling of 47640254 in words is "forty-seven million, six hundred forty thousand, two hundred fifty-four".