1634991428 has 36 divisors (see below), whose sum is σ = 3352725180. Its totient is φ = 695584512.

The previous prime is 1634991383. The next prime is 1634991443. The reversal of 1634991428 is 8241994361.

It can be written as a sum of positive squares in 2 ways, for example, as 436308544 + 1198682884 = 20888^2 + 34622^2 .

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 11 ways as a sum of consecutive naturals, for example, 3593 + ... + 57296.

It is an arithmetic number, because the mean of its divisors is an integer number (93131255).

Almost surely, 2^1634991428 is an apocalyptic number.

It is an amenable number.

1634991428 is an abundant number, since it is smaller than the sum of its proper divisors (1717733752).

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

1634991428 is a wasteful number, since it uses less digits than its factorization.

1634991428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61044 (or 61035 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 1634991428 is about 40435.0272412422. The cubic root of 1634991428 is about 1178.0719802898.

The spelling of 1634991428 in words is "one billion, six hundred thirty-four million, nine hundred ninety-one thousand, four hundred twenty-eight".