1897978035 has 16 divisors (see below), whose sum is σ = 3079537920. Its totient is φ = 997997280.

The previous prime is 1897978003. The next prime is 1897978037. The reversal of 1897978035 is 5308797981.

It is not a de Polignac number, because 1897978035 - 2⁵ = 1897978003 is a prime.

It is a super-2 number, since 2×1897978035² = 7204641242684922450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1897978037) 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, 890005 + ... + 892134.

It is an arithmetic number, because the mean of its divisors is an integer number (192471120).

Almost surely, 2^1897978035 is an apocalyptic number.

1897978035 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1897978035 is a deficient number, since it is larger than the sum of its proper divisors (1181559885).

1897978035 is a wasteful number, since it uses less digits than its factorization.

1897978035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782218.

The product of its (nonzero) digits is 3810240, while the sum is 57.

The square root of 1897978035 is about 43565.7897323118. The cubic root of 1897978035 is about 1238.1228176005.

The spelling of 1897978035 in words is "one billion, eight hundred ninety-seven million, nine hundred seventy-eight thousand, thirty-five".