998392540 has 24 divisors (see below), whose sum is σ = 2098736640. Its totient is φ = 398954688.

The previous prime is 998392537. The next prime is 998392543. The reversal of 998392540 is 45293899.

It is an interprime number because it is at equal distance from previous prime (998392537) and next prime (998392543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998392543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4380 + ... + 44899.

It is an arithmetic number, because the mean of its divisors is an integer number (87447360).

Almost surely, 2^998392540 is an apocalyptic number.

It is an amenable number.

998392540 is an abundant number, since it is smaller than the sum of its proper divisors (1100344100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998392540 is a wasteful number, since it uses less digits than its factorization.

998392540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50301 (or 50299 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 998392540 is about 31597.3502053574. The cubic root of 998392540 is about 999.4638926403.

The spelling of 998392540 in words is "nine hundred ninety-eight million, three hundred ninety-two thousand, five hundred forty".