1145420440 has 32 divisors (see below), whose sum is σ = 2580750000. Its totient is φ = 457536384.

The previous prime is 1145420431. The next prime is 1145420459. The reversal of 1145420440 is 440245411.

It is a super-3 number, since 3×1145420440³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10186 + ... + 48934.

Almost surely, 2^1145420440 is an apocalyptic number.

1145420440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145420440 is an abundant number, since it is smaller than the sum of its proper divisors (1435329560).

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

1145420440 is a wasteful number, since it uses less digits than its factorization.

1145420440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39499 (or 39495 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1145420440 is about 33844.0606310768. The cubic root of 1145420440 is about 1046.2969908100.

Adding to 1145420440 its reverse (440245411), we get a palindrome (1585665851).

The spelling of 1145420440 in words is "one billion, one hundred forty-five million, four hundred twenty thousand, four hundred forty".