903243978 has 96 divisors (see below), whose sum is σ = 2431228800. Its totient is φ = 235986048.

The previous prime is 903243973. The next prime is 903243989. The reversal of 903243978 is 879342309.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (903243973) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176013 + ... + 181071.

It is an arithmetic number, because the mean of its divisors is an integer number (25325300).

Almost surely, 2^903243978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 903243978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215614400).

903243978 is an abundant number, since it is smaller than the sum of its proper divisors (1527984822).

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

903243978 is a wasteful number, since it uses less digits than its factorization.

903243978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5196 (or 5193 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 903243978 is about 30054.0176681921. The cubic root of 903243978 is about 966.6480034182.

The spelling of 903243978 in words is "nine hundred three million, two hundred forty-three thousand, nine hundred seventy-eight".