1955840250 has 128 divisors (see below), whose sum is σ = 6008550912. Its totient is φ = 412646400.

The previous prime is 1955840153. The next prime is 1955840279. The reversal of 1955840250 is 520485591.

It is a super-2 number, since 2×1955840250² = 7650622167040125000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1955840199 and 1955840208.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53922 + ... + 82578.

It is an arithmetic number, because the mean of its divisors is an integer number (46941804).

Almost surely, 2^1955840250 is an apocalyptic number.

1955840250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1955840250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3004275456).

1955840250 is an abundant number, since it is smaller than the sum of its proper divisors (4052710662).

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

1955840250 is a wasteful number, since it uses less digits than its factorization.

1955840250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28697 (or 28687 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 1955840250 is about 44224.8827019360. The cubic root of 1955840250 is about 1250.5789851129.

The spelling of 1955840250 in words is "one billion, nine hundred fifty-five million, eight hundred forty thousand, two hundred fifty".