28377660 has 96 divisors (see below), whose sum is σ = 84188160. Its totient is φ = 7130368.

The previous prime is 28377637. The next prime is 28377673. The reversal of 28377660 is 6677382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81607 + ... + 81953.

It is an arithmetic number, because the mean of its divisors is an integer number (876960).

Almost surely, 2^28377660 is an apocalyptic number.

28377660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28377660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42094080).

28377660 is an abundant number, since it is smaller than the sum of its proper divisors (55810500).

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

28377660 is a wasteful number, since it uses less digits than its factorization.

28377660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 28377660 is about 5327.0686122857. The cubic root of 28377660 is about 305.0180406779.

The spelling of 28377660 in words is "twenty-eight million, three hundred seventy-seven thousand, six hundred sixty".