1420403040 has 576 divisors, whose sum is σ = 6102480384. Its totient is φ = 304570368.

The previous prime is 1420403029. The next prime is 1420403081. The reversal of 1420403040 is 403040241.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4626567 + ... + 4626873.

It is an arithmetic number, because the mean of its divisors is an integer number (10594584).

Almost surely, 2^1420403040 is an apocalyptic number.

1420403040 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 1420403040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3051240192).

1420403040 is an abundant number, since it is smaller than the sum of its proper divisors (4682077344).

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

1420403040 is a wasteful number, since it uses less digits than its factorization.

1420403040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1420403040 is about 37688.2347689567. The cubic root of 1420403040 is about 1124.0971956999.

Adding to 1420403040 its reverse (403040241), we get a palindrome (1823443281).

The spelling of 1420403040 in words is "one billion, four hundred twenty million, four hundred three thousand, forty".