9890428 has 6 divisors (see below), whose sum is σ = 17308256. Its totient is φ = 4945212.

The previous prime is 9890423. The next prime is 9890429. The reversal of 9890428 is 8240989.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9890423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1236300 + ... + 1236307.

Almost surely, 2^9890428 is an apocalyptic number.

It is an amenable number.

9890428 is a deficient number, since it is larger than the sum of its proper divisors (7417828).

9890428 is a wasteful number, since it uses less digits than its factorization.

9890428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472611 (or 2472609 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 9890428 is about 3144.9050860082. The cubic root of 9890428 is about 214.6536916316.

The spelling of 9890428 in words is "nine million, eight hundred ninety thousand, four hundred twenty-eight".