742224540 has 24 divisors (see below), whose sum is σ = 2078228880. Its totient is φ = 197926528.

The previous prime is 742224523. The next prime is 742224541. The reversal of 742224540 is 45422247.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 742224498 and 742224507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742224541) 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, 6185145 + ... + 6185264.

It is an arithmetic number, because the mean of its divisors is an integer number (86592870).

Almost surely, 2^742224540 is an apocalyptic number.

It is an amenable number.

742224540 is an abundant number, since it is smaller than the sum of its proper divisors (1336004340).

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

742224540 is a wasteful number, since it uses less digits than its factorization.

742224540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12370421 (or 12370419 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 30.

The square root of 742224540 is about 27243.7981933504. The cubic root of 742224540 is about 905.4096168787.

Adding to 742224540 its reverse (45422247), we get a palindrome (787646787).

The spelling of 742224540 in words is "seven hundred forty-two million, two hundred twenty-four thousand, five hundred forty".