8988421 has 12 divisors (see below), whose sum is σ = 9921772. Its totient is φ = 8094528.

The previous prime is 8988401. The next prime is 8988437. The reversal of 8988421 is 1248898.

8988421 = T₉₈ + T₉₉ + ... + T₃₇₉.

It can be written as a sum of positive squares in 2 ways, for example, as 497025 + 8491396 = 705^2 + 2914^2 .

It is not a de Polignac number, because 8988421 - 2¹³ = 8980229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8988401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28561 + ... + 28873.

Almost surely, 2^8988421 is an apocalyptic number.

It is an amenable number.

8988421 is a deficient number, since it is larger than the sum of its proper divisors (933351).

8988421 is a wasteful number, since it uses less digits than its factorization.

8988421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 373 counting only the distinct ones).

The product of its digits is 36864, while the sum is 40.

The square root of 8988421 is about 2998.0695455576. The cubic root of 8988421 is about 207.9191392422.

It can be divided in two parts, 8988 and 421, that added together give a square (9409 = 97²).

The spelling of 8988421 in words is "eight million, nine hundred eighty-eight thousand, four hundred twenty-one".