27489690 has 24 divisors (see below), whose sum is σ = 71473428. Its totient is φ = 7330560.

The previous prime is 27489667. The next prime is 27489719. The reversal of 27489690 is 9698472.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27468081 + 21609 = 5241^2 + 147^2 .

It is a super-2 number, since 2×27489690² = 1511366112592200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152631 + ... + 152810.

Almost surely, 2^27489690 is an apocalyptic number.

27489690 is an abundant number, since it is smaller than the sum of its proper divisors (43983738).

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

27489690 is a wasteful number, since it uses less digits than its factorization.

27489690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305454 (or 305451 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 27489690 is about 5243.0611287682. The cubic root of 27489690 is about 301.8028112045.

The spelling of 27489690 in words is "twenty-seven million, four hundred eighty-nine thousand, six hundred ninety".