8978431 has 32 divisors (see below), whose sum is σ = 12510720. Its totient is φ = 6238080.

The previous prime is 8978381. The next prime is 8978449. The reversal of 8978431 is 1348798.

It is not a de Polignac number, because 8978431 - 2¹⁵ = 8945663 is a prime.

It is a super-2 number, since 2×8978431² = 161224446443522, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (48384) is a multiple of the sum of its prime divisors (54).

8978431 is a lucky number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8978471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472540 + ... + 472558.

It is an arithmetic number, because the mean of its divisors is an integer number (390960).

Almost surely, 2^8978431 is an apocalyptic number.

8978431 is a deficient number, since it is larger than the sum of its proper divisors (3532289).

8978431 is a wasteful number, since it uses less digits than its factorization.

8978431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 54 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 8978431 is about 2996.4030102775. The cubic root of 8978431 is about 207.8420815032.

It can be divided in two parts, 8978 and 431, that added together give a square (9409 = 97²).

The spelling of 8978431 in words is "eight million, nine hundred seventy-eight thousand, four hundred thirty-one".