4294357978 has 4 divisors (see below), whose sum is σ = 6441536970. Its totient is φ = 2147178988.

The previous prime is 4294357943. The next prime is 4294358039. The reversal of 4294357978 is 8797534924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3037442769 + 1256915209 = 55113^2 + 35453^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073589493 + ... + 1073589496.

Almost surely, 2^4294357978 is an apocalyptic number.

4294357978 is a deficient number, since it is larger than the sum of its proper divisors (2147178992).

4294357978 is a wasteful number, since it uses less digits than its factorization.

4294357978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147178991.

The product of its digits is 15240960, while the sum is 58.

The square root of 4294357978 is about 65531.3511076950. The cubic root of 4294357978 is about 1625.4218048843.

The spelling of 4294357978 in words is "four billion, two hundred ninety-four million, three hundred fifty-seven thousand, nine hundred seventy-eight".