8442477 has 6 divisors (see below), whose sum is σ = 12194702. Its totient is φ = 5628312.

The previous prime is 8442457. The next prime is 8442481. The reversal of 8442477 is 7742448.

It can be written as a sum of positive squares in only one way, i.e., 5788836 + 2653641 = 2406^2 + 1629^2 .

It is not a de Polignac number, because 8442477 - 2⁷ = 8442349 is a prime.

It is a Duffinian number.

8442477 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8442437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 469018 + ... + 469035.

Almost surely, 2^8442477 is an apocalyptic number.

It is an amenable number.

8442477 is a deficient number, since it is larger than the sum of its proper divisors (3752225).

8442477 is a wasteful number, since it uses less digits than its factorization.

8442477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938059 (or 938056 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 8442477 is about 2905.5940872737. The cubic root of 8442477 is about 203.6213419885.

It can be divided in two parts, 844 and 2477, that added together give a triangular number (3321 = T₈₁).

The spelling of 8442477 in words is "eight million, four hundred forty-two thousand, four hundred seventy-seven".