1425640320 has 384 divisors, whose sum is σ = 5390985600. Its totient is φ = 345047040.

The previous prime is 1425640301. The next prime is 1425640339. The reversal of 1425640320 is 230465241.

1425640320 is a `hidden beast` number, since 1 + 4 + 256 + 403 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1425640301) and next prime (1425640339).

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5915400 + ... + 5915640.

It is an arithmetic number, because the mean of its divisors is an integer number (14039025).

Almost surely, 2^1425640320 is an apocalyptic number.

1425640320 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 1425640320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2695492800).

1425640320 is an abundant number, since it is smaller than the sum of its proper divisors (3965345280).

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

1425640320 is a wasteful number, since it uses less digits than its factorization.

1425640320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1425640320 is about 37757.6524694002. The cubic root of 1425640320 is about 1125.4770835784.

The spelling of 1425640320 in words is "one billion, four hundred twenty-five million, six hundred forty thousand, three hundred twenty".