47681428 has 12 divisors (see below), whose sum is σ = 83596212. Its totient is φ = 23796800.

The previous prime is 47681363. The next prime is 47681437. The reversal of 47681428 is 82418674.

It can be written as a sum of positive squares in 2 ways, for example, as 6874884 + 40806544 = 2622^2 + 6388^2 .

It is a super-2 number, since 2×47681428² = 4547037152238368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8473 + ... + 12928.

It is an arithmetic number, because the mean of its divisors is an integer number (6966351).

Almost surely, 2^47681428 is an apocalyptic number.

It is an amenable number.

47681428 is a deficient number, since it is larger than the sum of its proper divisors (35914784).

47681428 is a wasteful number, since it uses less digits than its factorization.

47681428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21962 (or 21960 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 47681428 is about 6905.1740021523. The cubic root of 47681428 is about 362.6183280772.

The spelling of 47681428 in words is "forty-seven million, six hundred eighty-one thousand, four hundred twenty-eight".