242811390 has 32 divisors (see below), whose sum is σ = 598500000. Its totient is φ = 62999424.

The previous prime is 242811383. The next prime is 242811407. The reversal of 242811390 is 93118242.

It is a super-2 number, since 2×242811390² = 117914742227464200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108265 + ... + 110484.

It is an arithmetic number, because the mean of its divisors is an integer number (18703125).

Almost surely, 2^242811390 is an apocalyptic number.

242811390 is an abundant number, since it is smaller than the sum of its proper divisors (355688610).

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

242811390 is a wasteful number, since it uses less digits than its factorization.

242811390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218796.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 242811390 is about 15582.4064251963. The cubic root of 242811390 is about 623.8636546697.

The spelling of 242811390 in words is "two hundred forty-two million, eight hundred eleven thousand, three hundred ninety".