26981964 has 24 divisors (see below), whose sum is σ = 69953520. Its totient is φ = 8993952.

The previous prime is 26981951. The next prime is 26981987. The reversal of 26981964 is 46918962.

It is a happy number.

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, 124809 + ... + 125024.

It is an arithmetic number, because the mean of its divisors is an integer number (2914730).

Almost surely, 2^26981964 is an apocalyptic number.

It is an amenable number.

26981964 is an abundant number, since it is smaller than the sum of its proper divisors (42971556).

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

26981964 is a wasteful number, since it uses less digits than its factorization.

26981964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249846 (or 249838 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 26981964 is about 5194.4166178696. The cubic root of 26981964 is about 299.9331851203.

The spelling of 26981964 in words is "twenty-six million, nine hundred eighty-one thousand, nine hundred sixty-four".