1897260140 has 24 divisors (see below), whose sum is σ = 4112771712. Its totient is φ = 734423040.

The previous prime is 1897260097. The next prime is 1897260149. The reversal of 1897260140 is 410627981.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1897260094 and 1897260103.

It is not an unprimeable number, because it can be changed into a prime (1897260149) 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, 1529429 + ... + 1530668.

It is an arithmetic number, because the mean of its divisors is an integer number (171365488).

Almost surely, 2^1897260140 is an apocalyptic number.

1897260140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1897260140 is an abundant number, since it is smaller than the sum of its proper divisors (2215511572).

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

1897260140 is a wasteful number, since it uses less digits than its factorization.

1897260140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060137 (or 3060135 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1897260140 is about 43557.5497474318. The cubic root of 1897260140 is about 1237.9666945662.

The spelling of 1897260140 in words is "one billion, eight hundred ninety-seven million, two hundred sixty thousand, one hundred forty".