1895420478 has 64 divisors (see below), whose sum is σ = 4625989632. Its totient is φ = 505945440.

The previous prime is 1895420477. The next prime is 1895420479. The reversal of 1895420478 is 8740245981.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1895420477) and next prime (1895420479).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1895420477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18723 + ... + 64353.

It is an arithmetic number, because the mean of its divisors is an integer number (72281088).

Almost surely, 2^1895420478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1895420478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2312994816).

1895420478 is an abundant number, since it is smaller than the sum of its proper divisors (2730569154).

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

1895420478 is a wasteful number, since it uses less digits than its factorization.

1895420478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45709.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 1895420478 is about 43536.4270238154. The cubic root of 1895420478 is about 1237.5664372453.

The spelling of 1895420478 in words is "one billion, eight hundred ninety-five million, four hundred twenty thousand, four hundred seventy-eight".