1545423040 has 56 divisors (see below), whose sum is σ = 4205764512. Its totient is φ = 529858560.

The previous prime is 1545423031. The next prime is 1545423041. The reversal of 1545423040 is 403245451.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1545423041) 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, 342721 + ... + 347200.

Almost surely, 2^1545423040 is an apocalyptic number.

1545423040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1545423040 is an abundant number, since it is smaller than the sum of its proper divisors (2660341472).

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

1545423040 is an equidigital number, since it uses as much as digits as its factorization.

1545423040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689945 (or 689935 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1545423040 is about 39311.8689456505. The cubic root of 1545423040 is about 1156.1542879040.

Adding to 1545423040 its reverse (403245451), we get a palindrome (1948668491).

The spelling of 1545423040 in words is "one billion, five hundred forty-five million, four hundred twenty-three thousand, forty".