47436394 has 4 divisors (see below), whose sum is σ = 71154594. Its totient is φ = 23718196.

The previous prime is 47436371. The next prime is 47436397. The reversal of 47436394 is 49363474.

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., 47430769 + 5625 = 6887^2 + 75^2 .

It is a super-2 number, since 2×47436394² = 4500422951446472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (47436397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11859097 + ... + 11859100.

Almost surely, 2^47436394 is an apocalyptic number.

47436394 is a deficient number, since it is larger than the sum of its proper divisors (23718200).

47436394 is a wasteful number, since it uses less digits than its factorization.

47436394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23718199.

The product of its digits is 217728, while the sum is 40.

The square root of 47436394 is about 6887.4083659966. The cubic root of 47436394 is about 361.9960979606.

The spelling of 47436394 in words is "forty-seven million, four hundred thirty-six thousand, three hundred ninety-four".