1955428398 has 288 divisors, whose sum is σ = 5809950720. Its totient is φ = 481995360.

The previous prime is 1955428393. The next prime is 1955428439. The reversal of 1955428398 is 8938245591.

1955428398 is a `hidden beast` number, since 1 + 9 + 5 + 542 + 8 + 3 + 98 = 666.

1955428398 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955428393) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 15397011 + ... + 15397137.

It is an arithmetic number, because the mean of its divisors is an integer number (20173440).

Almost surely, 2^1955428398 is an apocalyptic number.

1955428398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1955428398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2904975360).

1955428398 is an abundant number, since it is smaller than the sum of its proper divisors (3854522322).

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

1955428398 is a wasteful number, since it uses less digits than its factorization.

1955428398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 173 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 1955428398 is about 44220.2261188249. The cubic root of 1955428398 is about 1250.4911985273.

The spelling of 1955428398 in words is "one billion, nine hundred fifty-five million, four hundred twenty-eight thousand, three hundred ninety-eight".