1020658040 has 32 divisors (see below), whose sum is σ = 2298186000. Its totient is φ = 407960064.

The previous prime is 1020658031. The next prime is 1020658081. The reversal of 1020658040 is 408560201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49616 + ... + 67104.

Almost surely, 2^1020658040 is an apocalyptic number.

1020658040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020658040 is an abundant number, since it is smaller than the sum of its proper divisors (1277527960).

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

1020658040 is a wasteful number, since it uses less digits than its factorization.

1020658040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18959 (or 18955 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1020658040 is about 31947.7392001375. The cubic root of 1020658040 is about 1006.8391329630.

The spelling of 1020658040 in words is "one billion, twenty million, six hundred fifty-eight thousand, forty".