26987220 has 144 divisors (see below), whose sum is σ = 92951040. Its totient is φ = 6283008.

The previous prime is 26987209. The next prime is 26987291. The reversal of 26987220 is 2278962.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44157 + ... + 44763.

Almost surely, 2^26987220 is an apocalyptic number.

26987220 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 26987220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46475520).

26987220 is an abundant number, since it is smaller than the sum of its proper divisors (65963820).

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

26987220 is a wasteful number, since it uses less digits than its factorization.

26987220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 26987220 is about 5194.9225210777. The cubic root of 26987220 is about 299.9526591966.

The spelling of 26987220 in words is "twenty-six million, nine hundred eighty-seven thousand, two hundred twenty".