8720474 has 32 divisors (see below), whose sum is σ = 15828480. Its totient is φ = 3523968.

The previous prime is 8720471. The next prime is 8720477. The reversal of 8720474 is 4740278.

It is an interprime number because it is at equal distance from previous prime (8720471) and next prime (8720477).

It is a self number, because there is not a number n which added to its sum of digits gives 8720474.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18854 + ... + 19310.

It is an arithmetic number, because the mean of its divisors is an integer number (494640).

Almost surely, 2^8720474 is an apocalyptic number.

8720474 is a deficient number, since it is larger than the sum of its proper divisors (7108006).

8720474 is a wasteful number, since it uses less digits than its factorization.

8720474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 8720474 is about 2953.0448692832. The cubic root of 8720474 is about 205.8322227080.

It can be divided in two parts, 87204 and 74, that added together give a palindrome (87278).

The spelling of 8720474 in words is "eight million, seven hundred twenty thousand, four hundred seventy-four".