203780640 has 96 divisors (see below), whose sum is σ = 733622400. Its totient is φ = 46577664.

The previous prime is 203780627. The next prime is 203780657. The reversal of 203780640 is 46087302.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 203780598 and 203780607.

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, 26965 + ... + 33684.

It is an arithmetic number, because the mean of its divisors is an integer number (7641900).

Almost surely, 2^203780640 is an apocalyptic number.

203780640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203780640 is an abundant number, since it is smaller than the sum of its proper divisors (529841760).

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

203780640 is a wasteful number, since it uses less digits than its factorization.

203780640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60674 (or 60666 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 203780640 is about 14275.1756556618. The cubic root of 203780640 is about 588.4654558768.

The spelling of 203780640 in words is "two hundred three million, seven hundred eighty thousand, six hundred forty".