27980501 has 8 divisors (see below), whose sum is σ = 28319544. Its totient is φ = 27643840.

The previous prime is 27980497. The next prime is 27980503. The reversal of 27980501 is 10508972.

It can be written as a sum of positive squares in 4 ways, for example, as 15413476 + 12567025 = 3926^2 + 3545^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27980501 - 2² = 27980497 is a prime.

It is a super-2 number, since 2×27980501² = 1565816872422002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27980503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33671 + ... + 34491.

It is an arithmetic number, because the mean of its divisors is an integer number (3539943).

Almost surely, 2^27980501 is an apocalyptic number.

It is an amenable number.

27980501 is a deficient number, since it is larger than the sum of its proper divisors (339043).

27980501 is a wasteful number, since it uses less digits than its factorization.

27980501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 27980501 is about 5289.6598189298. The cubic root of 27980501 is about 303.5883921896.

The spelling of 27980501 in words is "twenty-seven million, nine hundred eighty thousand, five hundred one".