28621534 has 8 divisors (see below), whose sum is σ = 42956640. Its totient is φ = 14302656.

The previous prime is 28621513. The next prime is 28621553. The reversal of 28621534 is 43512682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28621496 and 28621505.

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, 2427 + ... + 7945.

It is an arithmetic number, because the mean of its divisors is an integer number (5369580).

Almost surely, 2^28621534 is an apocalyptic number.

28621534 is a deficient number, since it is larger than the sum of its proper divisors (14335106).

28621534 is a wasteful number, since it uses less digits than its factorization.

28621534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8114.

The product of its digits is 11520, while the sum is 31.

The square root of 28621534 is about 5349.9097188644. The cubic root of 28621534 is about 305.8893116398.

The spelling of 28621534 in words is "twenty-eight million, six hundred twenty-one thousand, five hundred thirty-four".