9002978 has 4 divisors (see below), whose sum is σ = 13504470. Its totient is φ = 4501488.

The previous prime is 9002977. The next prime is 9002993. The reversal of 9002978 is 8792009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8792009 = 17 ⋅517177.

It can be written as a sum of positive squares in only one way, i.e., 6880129 + 2122849 = 2623^2 + 1457^2 .

It is a super-2 number, since 2×9002978² = 162107225736968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9002977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2250743 + ... + 2250746.

Almost surely, 2^9002978 is an apocalyptic number.

9002978 is a deficient number, since it is larger than the sum of its proper divisors (4501492).

9002978 is a wasteful number, since it uses less digits than its factorization.

9002978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501491.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 9002978 is about 3000.4962922823. The cubic root of 9002978 is about 208.0313223293.

The spelling of 9002978 in words is "nine million, two thousand, nine hundred seventy-eight".