1420400240 has 60 divisors (see below), whose sum is σ = 3841613496. Its totient is φ = 486993024.

The previous prime is 1420400237. The next prime is 1420400243. The reversal of 1420400240 is 420040241.

It is an interprime number because it is at equal distance from previous prime (1420400237) and next prime (1420400243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420400243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177254 + ... + 185093.

Almost surely, 2^1420400240 is an apocalyptic number.

1420400240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1420400240 is an abundant number, since it is smaller than the sum of its proper divisors (2421213256).

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

1420400240 is a wasteful number, since it uses less digits than its factorization.

1420400240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362374 (or 362361 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1420400240 is about 37688.1976220673. The cubic root of 1420400240 is about 1124.0964570659.

Adding to 1420400240 its reverse (420040241), we get a palindrome (1840440481).

The spelling of 1420400240 in words is "one billion, four hundred twenty million, four hundred thousand, two hundred forty".