28401822 has 12 divisors (see below), whose sum is σ = 61537320. Its totient is φ = 9467268.

The previous prime is 28401767. The next prime is 28401823. The reversal of 28401822 is 22810482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28401823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 788922 + ... + 788957.

It is an arithmetic number, because the mean of its divisors is an integer number (5128110).

Almost surely, 2^28401822 is an apocalyptic number.

28401822 is an abundant number, since it is smaller than the sum of its proper divisors (33135498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28401822 is a wasteful number, since it uses less digits than its factorization.

28401822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577887 (or 1577884 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28401822 is about 5329.3359811519. The cubic root of 28401822 is about 305.1045847554.

The spelling of 28401822 in words is "twenty-eight million, four hundred one thousand, eight hundred twenty-two".