420145378 has 16 divisors (see below), whose sum is σ = 671156280. Its totient is φ = 196569856.

The previous prime is 420145357. The next prime is 420145379. The reversal of 420145378 is 873541024.

It can be written as a sum of positive squares in 4 ways, for example, as 377019889 + 43125489 = 19417^2 + 6567^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (420145379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29833 + ... + 41596.

Almost surely, 2^420145378 is an apocalyptic number.

420145378 is a deficient number, since it is larger than the sum of its proper divisors (251010902).

420145378 is a wasteful number, since it uses less digits than its factorization.

420145378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71621.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 420145378 is about 20497.4480850666. The cubic root of 420145378 is about 748.9736348884.

The spelling of 420145378 in words is "four hundred twenty million, one hundred forty-five thousand, three hundred seventy-eight".