203400988 has 48 divisors (see below), whose sum is σ = 442411200. Its totient is φ = 79819776.

The previous prime is 203400979. The next prime is 203400991. The reversal of 203400988 is 889004302.

It is a super-5 number, since 5×203400988⁵ (a number of 43 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11838 + ... + 23386.

It is an arithmetic number, because the mean of its divisors is an integer number (9216900).

Almost surely, 2^203400988 is an apocalyptic number.

203400988 is a gapful number since it is divisible by the number (28) 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 203400988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221205600).

203400988 is an abundant number, since it is smaller than the sum of its proper divisors (239010212).

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

203400988 is a wasteful number, since it uses less digits than its factorization.

203400988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11614 (or 11612 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 203400988 is about 14261.8718266573. The cubic root of 203400988 is about 588.0997833034.

The spelling of 203400988 in words is "two hundred three million, four hundred thousand, nine hundred eighty-eight".