1945284457 has 8 divisors (see below), whose sum is σ = 2020348800. Its totient is φ = 1871623344.

The previous prime is 1945284437. The next prime is 1945284557. The reversal of 1945284457 is 7544825491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1945284457 - 2⁷ = 1945284329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1945284457.

It is not an unprimeable number, because it can be changed into a prime (1945284437) 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, 347982 + ... + 353527.

It is an arithmetic number, because the mean of its divisors is an integer number (252543600).

Almost surely, 2^1945284457 is an apocalyptic number.

It is an amenable number.

1945284457 is a deficient number, since it is larger than the sum of its proper divisors (75064343).

1945284457 is an equidigital number, since it uses as much as digits as its factorization.

1945284457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701615.

The product of its digits is 1612800, while the sum is 49.

The square root of 1945284457 is about 44105.3790030196. The cubic root of 1945284457 is about 1248.3251076174.

The spelling of 1945284457 in words is "one billion, nine hundred forty-five million, two hundred eighty-four thousand, four hundred fifty-seven".