1912265820 has 240 divisors, whose sum is σ = 6273952608. Its totient is φ = 487088640.

The previous prime is 1912265813. The next prime is 1912265843. The reversal of 1912265820 is 285622191.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 3656079 + ... + 3656601.

Almost surely, 2^1912265820 is an apocalyptic number.

1912265820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1912265820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3136976304).

1912265820 is an abundant number, since it is smaller than the sum of its proper divisors (4361686788).

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

1912265820 is a wasteful number, since it uses less digits than its factorization.

1912265820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1912265820 is about 43729.4616934625. The cubic root of 1912265820 is about 1241.2218748476.

The spelling of 1912265820 in words is "one billion, nine hundred twelve million, two hundred sixty-five thousand, eight hundred twenty".