1405415550 has 144 divisors (see below), whose sum is σ = 4423324032. Its totient is φ = 292017600.

The previous prime is 1405415549. The next prime is 1405415591. The reversal of 1405415550 is 555145041.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 72159 + ... + 89541.

It is an arithmetic number, because the mean of its divisors is an integer number (30717528).

Almost surely, 2^1405415550 is an apocalyptic number.

1405415550 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 1405415550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211662016).

1405415550 is an abundant number, since it is smaller than the sum of its proper divisors (3017908482).

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

1405415550 is a wasteful number, since it uses less digits than its factorization.

1405415550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17423 (or 17411 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 1405415550 is about 37488.8723490051. The cubic root of 1405415550 is about 1120.1295423079.

The spelling of 1405415550 in words is "one billion, four hundred five million, four hundred fifteen thousand, five hundred fifty".