1428375990 has 16 divisors (see below), whose sum is σ = 3428102448. Its totient is φ = 380900256.

The previous prime is 1428375979. The next prime is 1428375997. The reversal of 1428375990 is 995738241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428375997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23806237 + ... + 23806296.

It is an arithmetic number, because the mean of its divisors is an integer number (214256403).

Almost surely, 2^1428375990 is an apocalyptic number.

1428375990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428375990 is an abundant number, since it is smaller than the sum of its proper divisors (1999726458).

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

1428375990 is a wasteful number, since it uses less digits than its factorization.

1428375990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47612543.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 1428375990 is about 37793.8618032082. The cubic root of 1428375990 is about 1126.1965185701.

The spelling of 1428375990 in words is "one billion, four hundred twenty-eight million, three hundred seventy-five thousand, nine hundred ninety".