28470631 has 16 divisors (see below), whose sum is σ = 34594560. Its totient is φ = 22872960.

The previous prime is 28470613. The next prime is 28470647. The reversal of 28470631 is 13607482.

It is a cyclic number.

It is not a de Polignac number, because 28470631 - 2¹³ = 28462439 is a prime.

It is a super-2 number, since 2×28470631² = 1621153659076322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28470593 and 28470602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28470331) 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, 49576 + ... + 50146.

It is an arithmetic number, because the mean of its divisors is an integer number (2162160).

Almost surely, 2^28470631 is an apocalyptic number.

28470631 is a deficient number, since it is larger than the sum of its proper divisors (6123929).

28470631 is a wasteful number, since it uses less digits than its factorization.

28470631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 28470631 is about 5335.7877581478. The cubic root of 28470631 is about 305.3507780004.

The spelling of 28470631 in words is "twenty-eight million, four hundred seventy thousand, six hundred thirty-one".