47129378 has 4 divisors (see below), whose sum is σ = 70694070. Its totient is φ = 23564688.

The previous prime is 47129371. The next prime is 47129417. The reversal of 47129378 is 87392174.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43864129 + 3265249 = 6623^2 + 1807^2 .

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (47129371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11782343 + ... + 11782346.

Almost surely, 2^47129378 is an apocalyptic number.

47129378 is a deficient number, since it is larger than the sum of its proper divisors (23564692).

47129378 is a wasteful number, since it uses less digits than its factorization.

47129378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23564691.

The product of its digits is 84672, while the sum is 41.

The square root of 47129378 is about 6865.0839761798. The cubic root of 47129378 is about 361.2134413022.

The spelling of 47129378 in words is "forty-seven million, one hundred twenty-nine thousand, three hundred seventy-eight".