1550419920 has 480 divisors, whose sum is σ = 6358283520. Its totient is φ = 340070400.

The previous prime is 1550419901. The next prime is 1550420017. The reversal of 1550419920 is 299140551.

1550419920 is a `hidden beast` number, since 1 + 550 + 4 + 19 + 92 + 0 = 666.

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 polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25416690 + ... + 25416750.

It is an arithmetic number, because the mean of its divisors is an integer number (13246424).

Almost surely, 2^1550419920 is an apocalyptic number.

1550419920 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 1550419920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3179141760).

1550419920 is an abundant number, since it is smaller than the sum of its proper divisors (4807863600).

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

1550419920 is a wasteful number, since it uses less digits than its factorization.

1550419920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 1550419920 is about 39375.3719982428. The cubic root of 1550419920 is about 1157.3990277444.

The spelling of 1550419920 in words is "one billion, five hundred fifty million, four hundred nineteen thousand, nine hundred twenty".