1420089978 has 16 divisors (see below), whose sum is σ = 2841659136. Its totient is φ = 473116800.

The previous prime is 1420089977. The next prime is 1420090051. The reversal of 1420089978 is 8799800241.

It is not an unprimeable number, because it can be changed into a prime (1420089971) 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, 48951 + ... + 72362.

It is an arithmetic number, because the mean of its divisors is an integer number (177603696).

Almost surely, 2^1420089978 is an apocalyptic number.

1420089978 is an abundant number, since it is smaller than the sum of its proper divisors (1421569158).

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

1420089978 is a wasteful number, since it uses less digits than its factorization.

1420089978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123269.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 1420089978 is about 37684.0812280199. The cubic root of 1420089978 is about 1124.0146045940.

The spelling of 1420089978 in words is "one billion, four hundred twenty million, eighty-nine thousand, nine hundred seventy-eight".