28412121 has 16 divisors (see below), whose sum is σ = 38960064. Its totient is φ = 18407424.

The previous prime is 28412119. The next prime is 28412123. The reversal of 28412121 is 12121482.

It is an interprime number because it is at equal distance from previous prime (28412119) and next prime (28412123).

It is not a de Polignac number, because 28412121 - 2¹ = 28412119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28412123) 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, 32725 + ... + 33581.

It is an arithmetic number, because the mean of its divisors is an integer number (2435004).

Almost surely, 2^28412121 is an apocalyptic number.

It is an amenable number.

28412121 is a deficient number, since it is larger than the sum of its proper divisors (10547943).

28412121 is a wasteful number, since it uses less digits than its factorization.

28412121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160.

The product of its digits is 256, while the sum is 21.

The square root of 28412121 is about 5330.3021490343. The cubic root of 28412121 is about 305.1414590609.

The spelling of 28412121 in words is "twenty-eight million, four hundred twelve thousand, one hundred twenty-one".