28401807 has 16 divisors (see below), whose sum is σ = 44335872. Its totient is φ = 15833280.

The previous prime is 28401767. The next prime is 28401823. The reversal of 28401807 is 70810482.

It is not a de Polignac number, because 28401807 - 2⁶ = 28401743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28401847) 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, 15633 + ... + 17354.

It is an arithmetic number, because the mean of its divisors is an integer number (2770992).

Almost surely, 2^28401807 is an apocalyptic number.

28401807 is a deficient number, since it is larger than the sum of its proper divisors (15934065).

28401807 is a wasteful number, since it uses less digits than its factorization.

28401807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33038.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 28401807 is about 5329.3345738469. The cubic root of 28401807 is about 305.1045310432.

The spelling of 28401807 in words is "twenty-eight million, four hundred one thousand, eight hundred seven".