1238951040 has 128 divisors (see below), whose sum is σ = 3981035520. Its totient is φ = 327720960.

The previous prime is 1238951023. The next prime is 1238951059. The reversal of 1238951040 is 401598321.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 1238950992 and 1238951010.

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, 241300 + ... + 246380.

It is an arithmetic number, because the mean of its divisors is an integer number (31101840).

Almost surely, 2^1238951040 is an apocalyptic number.

1238951040 is a gapful number since it is divisible by the number (10) 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 1238951040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1990517760).

1238951040 is an abundant number, since it is smaller than the sum of its proper divisors (2742084480).

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

1238951040 is a wasteful number, since it uses less digits than its factorization.

1238951040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5230 (or 5218 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1238951040 is about 35198.7363409541. The cubic root of 1238951040 is about 1074.0340455763.

The spelling of 1238951040 in words is "one billion, two hundred thirty-eight million, nine hundred fifty-one thousand, forty".