1858013940 has 48 divisors (see below), whose sum is σ = 5221681920. Its totient is φ = 493637760.

The previous prime is 1858013921. The next prime is 1858013947. The reversal of 1858013940 is 493108581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1858013947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40875 + ... + 73394.

It is an arithmetic number, because the mean of its divisors is an integer number (108785040).

Almost surely, 2^1858013940 is an apocalyptic number.

1858013940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1858013940 is an abundant number, since it is smaller than the sum of its proper divisors (3363667980).

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

1858013940 is a wasteful number, since it uses less digits than its factorization.

1858013940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114552 (or 114550 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 1858013940 is about 43104.6858241653. The cubic root of 1858013940 is about 1229.3710711578.

The spelling of 1858013940 in words is "one billion, eight hundred fifty-eight million, thirteen thousand, nine hundred forty".