197540830 has 16 divisors (see below), whose sum is σ = 359859024. Its totient is φ = 78064000.

The previous prime is 197540801. The next prime is 197540831. The reversal of 197540830 is 38045791.

It is a self number, because there is not a number n which added to its sum of digits gives 197540830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197540831) 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, 118171 + ... + 119830.

It is an arithmetic number, because the mean of its divisors is an integer number (22491189).

Almost surely, 2^197540830 is an apocalyptic number.

197540830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197540830 is a deficient number, since it is larger than the sum of its proper divisors (162318194).

197540830 is a wasteful number, since it uses less digits than its factorization.

197540830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238091.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 197540830 is about 14054.9219136927. The cubic root of 197540830 is about 582.3967704978.

The spelling of 197540830 in words is "one hundred ninety-seven million, five hundred forty thousand, eight hundred thirty".