28157426 has 24 divisors (see below), whose sum is σ = 46698960. Its totient is φ = 12723480.

The previous prime is 28157383. The next prime is 28157429. The reversal of 28157426 is 62475182.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28157429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74105 + ... + 74483.

It is an arithmetic number, because the mean of its divisors is an integer number (1945790).

Almost surely, 2^28157426 is an apocalyptic number.

28157426 is a deficient number, since it is larger than the sum of its proper divisors (18541534).

28157426 is a wasteful number, since it uses less digits than its factorization.

28157426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 699 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 28157426 is about 5306.3571308384. The cubic root of 28157426 is about 304.2269268818.

The spelling of 28157426 in words is "twenty-eight million, one hundred fifty-seven thousand, four hundred twenty-six".