423720550 has 24 divisors (see below), whose sum is σ = 859768632. Its totient is φ = 154080000.

The previous prime is 423720523. The next prime is 423720569. The reversal of 423720550 is 55027324.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384651 + ... + 385750.

It is an arithmetic number, because the mean of its divisors is an integer number (35823693).

Almost surely, 2^423720550 is an apocalyptic number.

423720550 is an abundant number, since it is smaller than the sum of its proper divisors (436048082).

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

423720550 is a wasteful number, since it uses less digits than its factorization.

423720550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770424 (or 770419 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 423720550 is about 20584.4735176783. The cubic root of 423720550 is about 751.0920683365.

Adding to 423720550 its reverse (55027324), we get a palindrome (478747874).

It can be divided in two parts, 4 and 23720550, that multiplied together give a triangular number (94882200 = T₁₃₇₇₅).

The spelling of 423720550 in words is "four hundred twenty-three million, seven hundred twenty thousand, five hundred fifty".