242181428 has 24 divisors (see below), whose sum is σ = 439525632. Its totient is φ = 116666784.

The previous prime is 242181419. The next prime is 242181437. The reversal of 242181428 is 824181242.

It is an interprime number because it is at equal distance from previous prime (242181419) and next prime (242181437).

It is a junction number, because it is equal to n+sod(n) for n = 242181394 and 242181403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7301 + ... + 23187.

It is an arithmetic number, because the mean of its divisors is an integer number (18313568).

Almost surely, 2^242181428 is an apocalyptic number.

It is an amenable number.

242181428 is a deficient number, since it is larger than the sum of its proper divisors (197344204).

242181428 is a wasteful number, since it uses less digits than its factorization.

242181428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16031 (or 16029 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The square root of 242181428 is about 15562.1794103525. The cubic root of 242181428 is about 623.3236597264.

The spelling of 242181428 in words is "two hundred forty-two million, one hundred eighty-one thousand, four hundred twenty-eight".