245426640 has 40 divisors (see below), whose sum is σ = 760823328. Its totient is φ = 65447040.

The previous prime is 245426633. The next prime is 245426711. The reversal of 245426640 is 46624542.

It is a tau number, because it is divible by the number of its divisors (40).

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, 511066 + ... + 511545.

Almost surely, 2^245426640 is an apocalyptic number.

245426640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245426640 is an abundant number, since it is smaller than the sum of its proper divisors (515396688).

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

245426640 is a wasteful number, since it uses less digits than its factorization.

245426640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022627 (or 1022621 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 245426640 is about 15666.0984294112. The cubic root of 245426640 is about 626.0954782287.

The spelling of 245426640 in words is "two hundred forty-five million, four hundred twenty-six thousand, six hundred forty".