203478990 has 64 divisors (see below), whose sum is σ = 573737472. Its totient is φ = 45532800.

The previous prime is 203478973. The next prime is 203478991. The reversal of 203478990 is 99874302.

203478990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203478991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19426 + ... + 28005.

It is an arithmetic number, because the mean of its divisors is an integer number (8964648).

Almost surely, 2^203478990 is an apocalyptic number.

203478990 is an abundant number, since it is smaller than the sum of its proper divisors (370258482).

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

203478990 is a wasteful number, since it uses less digits than its factorization.

203478990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47465.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 203478990 is about 14264.6061985601. The cubic root of 203478990 is about 588.1749502550.

The spelling of 203478990 in words is "two hundred three million, four hundred seventy-eight thousand, nine hundred ninety".