27801004 has 24 divisors (see below), whose sum is σ = 60657408. Its totient is φ = 10831440.

The previous prime is 27800989. The next prime is 27801029. The reversal of 27801004 is 40010872.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44824 + ... + 45439.

It is an arithmetic number, because the mean of its divisors is an integer number (2527392).

Almost surely, 2^27801004 is an apocalyptic number.

It is an amenable number.

27801004 is an abundant number, since it is smaller than the sum of its proper divisors (32856404).

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

27801004 is a wasteful number, since it uses less digits than its factorization.

27801004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90285 (or 90283 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 27801004 is about 5272.6657394529. The cubic root of 27801004 is about 302.9378183168.

Adding to 27801004 its reverse (40010872), we get a palindrome (67811876).

The spelling of 27801004 in words is "twenty-seven million, eight hundred one thousand, four".