283121879040 has 2880 divisors, whose sum is σ = 1417131555840. Its totient is φ = 52553318400.

The previous prime is 283121878993. The next prime is 283121879057. The reversal of 283121879040 is 40978121382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (2880).

It is a super-2 number, since 2×283121879040² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 9132963825 + ... + 9132963855.

It is an arithmetic number, because the mean of its divisors is an integer number (492059568).

Almost surely, 2^283121879040 is an apocalyptic number.

283121879040 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 283121879040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708565777920).

283121879040 is an abundant number, since it is smaller than the sum of its proper divisors (1134009676800).

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

283121879040 is a wasteful number, since it uses less digits than its factorization.

283121879040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 283121879040 in words is "two hundred eighty-three billion, one hundred twenty-one million, eight hundred seventy-nine thousand, forty".