1023015040 has 64 divisors (see below), whose sum is σ = 2449517760. Its totient is φ = 408558592.

The previous prime is 1023015017. The next prime is 1023015041. The reversal of 1023015040 is 405103201.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1023015041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782067 + ... + 783373.

It is an arithmetic number, because the mean of its divisors is an integer number (38273715).

Almost surely, 2^1023015040 is an apocalyptic number.

1023015040 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 1023015040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224758880).

1023015040 is an abundant number, since it is smaller than the sum of its proper divisors (1426502720).

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

1023015040 is a wasteful number, since it uses less digits than its factorization.

1023015040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2549 (or 2537 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1023015040 is about 31984.6062974050. The cubic root of 1023015040 is about 1007.6135664949.

Adding to 1023015040 its reverse (405103201), we get a palindrome (1428118241).

The spelling of 1023015040 in words is "one billion, twenty-three million, fifteen thousand, forty".