202478640 has 320 divisors, whose sum is σ = 789282816. Its totient is φ = 41803776.

The previous prime is 202478629. The next prime is 202478641. The reversal of 202478640 is 46874202.

It is not an unprimeable number, because it can be changed into a prime (202478641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1594257 + ... + 1594383.

Almost surely, 2^202478640 is an apocalyptic number.

202478640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202478640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394641408).

202478640 is an abundant number, since it is smaller than the sum of its proper divisors (586804176).

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

202478640 is a wasteful number, since it uses less digits than its factorization.

202478640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 202478640 is about 14229.4989370673. The cubic root of 202478640 is about 587.2094981474.

The spelling of 202478640 in words is "two hundred two million, four hundred seventy-eight thousand, six hundred forty".