201977380 has 24 divisors (see below), whose sum is σ = 462712320. Its totient is φ = 73446240.

The previous prime is 201977359. The next prime is 201977389. The reversal of 201977380 is 83779102.

It is not an unprimeable number, because it can be changed into a prime (201977389) 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, 458820 + ... + 459259.

It is an arithmetic number, because the mean of its divisors is an integer number (19279680).

Almost surely, 2^201977380 is an apocalyptic number.

201977380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201977380 is an abundant number, since it is smaller than the sum of its proper divisors (260734940).

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

201977380 is a wasteful number, since it uses less digits than its factorization.

201977380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918099 (or 918097 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 201977380 is about 14211.8746124500. The cubic root of 201977380 is about 586.7245286995.

The spelling of 201977380 in words is "two hundred one million, nine hundred seventy-seven thousand, three hundred eighty".