8978424 has 64 divisors (see below), whose sum is σ = 27632640. Its totient is φ = 2367360.

The previous prime is 8978381. The next prime is 8978449. The reversal of 8978424 is 4248798.

It is a super-2 number, since 2×8978424² = 161224195047552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a d-powerful number, because it can be written as 8 + 9⁷ + 7³ + 8³ + 4⁴ + 2⁵ + 4¹¹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129 + ... + 4239.

It is an arithmetic number, because the mean of its divisors is an integer number (431760).

Almost surely, 2^8978424 is an apocalyptic number.

8978424 is a gapful number since it is divisible by the number (84) 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 8978424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13816320).

8978424 is an abundant number, since it is smaller than the sum of its proper divisors (18654216).

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

8978424 is a wasteful number, since it uses less digits than its factorization.

8978424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140 (or 4136 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 8978424 is about 2996.4018422101. The cubic root of 8978424 is about 207.8420274888.

It can be divided in two parts, 897 and 8424, that multiplied together give a triangular number (7556328 = T₃₈₈₇).

The spelling of 8978424 in words is "eight million, nine hundred seventy-eight thousand, four hundred twenty-four".