1564242040 has 32 divisors (see below), whose sum is σ = 3533589360. Its totient is φ = 623200000.

The previous prime is 1564242037. The next prime is 1564242041. The reversal of 1564242040 is 402424651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1564242041) 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, 67861 + ... + 87940.

Almost surely, 2^1564242040 is an apocalyptic number.

1564242040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1564242040 is an abundant number, since it is smaller than the sum of its proper divisors (1969347320).

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

1564242040 is a wasteful number, since it uses less digits than its factorization.

1564242040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156063 (or 156059 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1564242040 is about 39550.4998704188. The cubic root of 1564242040 is about 1160.8282926854.

Adding to 1564242040 its reverse (402424651), we get a palindrome (1966666691).

The spelling of 1564242040 in words is "one billion, five hundred sixty-four million, two hundred forty-two thousand, forty".