1023402140 has 24 divisors (see below), whose sum is σ = 2150538432. Its totient is φ = 409095360.

The previous prime is 1023402131. The next prime is 1023402143. The reversal of 1023402140 is 412043201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023402143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16637 + ... + 48203.

It is an arithmetic number, because the mean of its divisors is an integer number (89605768).

Almost surely, 2^1023402140 is an apocalyptic number.

1023402140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023402140 is an abundant number, since it is smaller than the sum of its proper divisors (1127136292).

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

1023402140 is a wasteful number, since it uses less digits than its factorization.

1023402140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33197 (or 33195 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1023402140 is about 31990.6570735895. The cubic root of 1023402140 is about 1007.7406412070.

Adding to 1023402140 its reverse (412043201), we get a palindrome (1435445341).

The spelling of 1023402140 in words is "one billion, twenty-three million, four hundred two thousand, one hundred forty".