840988 has 6 divisors (see below), whose sum is σ = 1471736. Its totient is φ = 420492.

The previous prime is 840979. The next prime is 840989. The reversal of 840988 is 889048.

840988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×840988² = 1414521632288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105120 + ... + 105127.

2⁸⁴⁰⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

840988 is a deficient number, since it is larger than the sum of its proper divisors (630748).

840988 is a wasteful number, since it uses less digits than its factorization.

840988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210251 (or 210249 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 840988 is about 917.0539787821. The cubic root of 840988 is about 94.3908578238.

The spelling of 840988 in words is "eight hundred forty thousand, nine hundred eighty-eight".