1405002040 has 32 divisors (see below), whose sum is σ = 3404429280. Its totient is φ = 518769792.

The previous prime is 1405002023. The next prime is 1405002041. The reversal of 1405002040 is 402005041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405002041) 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, 1350444 + ... + 1351483.

It is an arithmetic number, because the mean of its divisors is an integer number (106388415).

Almost surely, 2^1405002040 is an apocalyptic number.

1405002040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1405002040 is an abundant number, since it is smaller than the sum of its proper divisors (1999427240).

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

1405002040 is a wasteful number, since it uses less digits than its factorization.

1405002040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701951 (or 2701947 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1405002040 is about 37483.3568400697. The cubic root of 1405002040 is about 1120.0196743993.

Adding to 1405002040 its reverse (402005041), we get a palindrome (1807007081).

The spelling of 1405002040 in words is "one billion, four hundred five million, two thousand, forty".