1951228000 has 192 divisors, whose sum is σ = 5072191488. Its totient is φ = 736243200.

The previous prime is 1951227979. The next prime is 1951228001. The reversal of 1951228000 is 8221591.

It is a self number, because there is not a number n which added to its sum of digits gives 1951228000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1951228001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11683917 + ... + 11684083.

It is an arithmetic number, because the mean of its divisors is an integer number (26417664).

Almost surely, 2^1951228000 is an apocalyptic number.

1951228000 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 1951228000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2536095744).

1951228000 is an abundant number, since it is smaller than the sum of its proper divisors (3120963488).

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

1951228000 is a wasteful number, since it uses less digits than its factorization.

1951228000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1951228000 is about 44172.7065052618. The cubic root of 1951228000 is about 1249.5951755746.

Adding to 1951228000 its reverse (8221591), we get a palindrome (1959449591).

The spelling of 1951228000 in words is "one billion, nine hundred fifty-one million, two hundred twenty-eight thousand".