1420100778 has 32 divisors (see below), whose sum is σ = 2889815040. Its totient is φ = 465133680.

The previous prime is 1420100777. The next prime is 1420100779. The reversal of 1420100778 is 8770010241.

It is an interprime number because it is at equal distance from previous prime (1420100777) and next prime (1420100779).

It is not an unprimeable number, because it can be changed into a prime (1420100777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164223 + ... + 172653.

It is an arithmetic number, because the mean of its divisors is an integer number (90306720).

Almost surely, 2^1420100778 is an apocalyptic number.

1420100778 is an abundant number, since it is smaller than the sum of its proper divisors (1469714262).

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

1420100778 is a wasteful number, since it uses less digits than its factorization.

1420100778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8922.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 1420100778 is about 37684.2245243285. The cubic root of 1420100778 is about 1124.0174540207.

The spelling of 1420100778 in words is "one billion, four hundred twenty million, one hundred thousand, seven hundred seventy-eight".