1550406240 has 72 divisors (see below), whose sum is σ = 5290766208. Its totient is φ = 413441280.

The previous prime is 1550406233. The next prime is 1550406259. The reversal of 1550406240 is 426040551.

1550406240 is a `hidden beast` number, since 15 + 5 + 0 + 406 + 240 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 536896 + ... + 539775.

It is an arithmetic number, because the mean of its divisors is an integer number (73482864).

Almost surely, 2^1550406240 is an apocalyptic number.

1550406240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550406240 is an abundant number, since it is smaller than the sum of its proper divisors (3740359968).

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

1550406240 is a wasteful number, since it uses less digits than its factorization.

1550406240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076692 (or 1076681 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1550406240 is about 39375.1982852150. The cubic root of 1550406240 is about 1157.3956236633.

Adding to 1550406240 its reverse (426040551), we get a palindrome (1976446791).

The spelling of 1550406240 in words is "one billion, five hundred fifty million, four hundred six thousand, two hundred forty".