1427701978 has 4 divisors (see below), whose sum is σ = 2141552970. Its totient is φ = 713850988.

The previous prime is 1427701967. The next prime is 1427701997. The reversal of 1427701978 is 8791077241.

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., 726140809 + 701561169 = 26947^2 + 26487^2 .

It is a super-2 number, since 2×1427701978² = 4076665875970224968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356925493 + ... + 356925496.

Almost surely, 2^1427701978 is an apocalyptic number.

1427701978 is a deficient number, since it is larger than the sum of its proper divisors (713850992).

1427701978 is an equidigital number, since it uses as much as digits as its factorization.

1427701978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713850991.

The product of its (nonzero) digits is 197568, while the sum is 46.

The square root of 1427701978 is about 37784.9438004081. The cubic root of 1427701978 is about 1126.0193501402.

The spelling of 1427701978 in words is "one billion, four hundred twenty-seven million, seven hundred one thousand, nine hundred seventy-eight".