157563440 has 20 divisors (see below), whose sum is σ = 366335184. Its totient is φ = 63025344.

The previous prime is 157563407. The next prime is 157563443. The reversal of 157563440 is 44365751.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 157563440.

It is not an unprimeable number, because it can be changed into a prime (157563443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984692 + ... + 984851.

Almost surely, 2^157563440 is an apocalyptic number.

157563440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157563440 is an abundant number, since it is smaller than the sum of its proper divisors (208771744).

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

157563440 is a wasteful number, since it uses less digits than its factorization.

157563440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969556 (or 1969550 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 157563440 is about 12552.4276536453. The cubic root of 157563440 is about 540.1136477765.

The spelling of 157563440 in words is "one hundred fifty-seven million, five hundred sixty-three thousand, four hundred forty".