47278740 has 48 divisors (see below), whose sum is σ = 135616320. Its totient is φ = 12299520.

The previous prime is 47278739. The next prime is 47278747. The reversal of 47278740 is 4787274.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47278747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7150 + ... + 12069.

It is an arithmetic number, because the mean of its divisors is an integer number (2825340).

Almost surely, 2^47278740 is an apocalyptic number.

It is an amenable number.

47278740 is an abundant number, since it is smaller than the sum of its proper divisors (88337580).

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

47278740 is a wasteful number, since it uses less digits than its factorization.

47278740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19272 (or 19270 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 47278740 is about 6875.9537520260. The cubic root of 47278740 is about 361.5946236997.

The spelling of 47278740 in words is "forty-seven million, two hundred seventy-eight thousand, seven hundred forty".