1023254640 has 80 divisors (see below), whose sum is σ = 3524551200. Its totient is φ = 272867328.

The previous prime is 1023254611. The next prime is 1023254653. The reversal of 1023254640 is 464523201.

1023254640 is a `hidden beast` number, since 10 + 2 + 3 + 2 + 5 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 234705 + ... + 239024.

It is an arithmetic number, because the mean of its divisors is an integer number (44056890).

Almost surely, 2^1023254640 is an apocalyptic number.

1023254640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023254640 is an abundant number, since it is smaller than the sum of its proper divisors (2501296560).

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

1023254640 is a wasteful number, since it uses less digits than its factorization.

1023254640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473751 (or 473739 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1023254640 is about 31988.3516299293. The cubic root of 1023254640 is about 1007.6922246298.

Adding to 1023254640 its reverse (464523201), we get a palindrome (1487777841).

The spelling of 1023254640 in words is "one billion, twenty-three million, two hundred fifty-four thousand, six hundred forty".