1550897428 has 24 divisors (see below), whose sum is σ = 2783025000. Its totient is φ = 755973120.

The previous prime is 1550897417. The next prime is 1550897473. The reversal of 1550897428 is 8247980551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 743044 + 1550154384 = 862^2 + 39372^2 .

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 7 ways as a sum of consecutive naturals, for example, 553 + ... + 55696.

It is an arithmetic number, because the mean of its divisors is an integer number (115959375).

Almost surely, 2^1550897428 is an apocalyptic number.

It is an amenable number.

1550897428 is a deficient number, since it is larger than the sum of its proper divisors (1232127572).

1550897428 is a wasteful number, since it uses less digits than its factorization.

1550897428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56427 (or 56425 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The square root of 1550897428 is about 39381.4350678083. The cubic root of 1550897428 is about 1157.5178365392.

The spelling of 1550897428 in words is "one billion, five hundred fifty million, eight hundred ninety-seven thousand, four hundred twenty-eight".