201469640 has 16 divisors (see below), whose sum is σ = 453306780. Its totient is φ = 80587840.

The previous prime is 201469637. The next prime is 201469643. The reversal of 201469640 is 46964102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (201469637) and next prime (201469643).

It can be written as a sum of positive squares in 2 ways, for example, as 201469636 + 4 = 14194^2 + 2^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201469597 and 201469606.

It is not an unprimeable number, because it can be changed into a prime (201469643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2518331 + ... + 2518410.

Almost surely, 2^201469640 is an apocalyptic number.

201469640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201469640 is an abundant number, since it is smaller than the sum of its proper divisors (251837140).

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

201469640 is a wasteful number, since it uses less digits than its factorization.

201469640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5036752 (or 5036748 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 201469640 is about 14194.0001409046. Note that the first 3 decimals coincide. The cubic root of 201469640 is about 586.2324711413.

The spelling of 201469640 in words is "two hundred one million, four hundred sixty-nine thousand, six hundred forty".