1423442730 has 32 divisors (see below), whose sum is σ = 3480724224. Its totient is φ = 372422336.

The previous prime is 1423442701. The next prime is 1423442731. The reversal of 1423442730 is 372443241.

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

It is not an unprimeable number, because it can be changed into a prime (1423442731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446034 + ... + 449213.

It is an arithmetic number, because the mean of its divisors is an integer number (108772632).

Almost surely, 2^1423442730 is an apocalyptic number.

1423442730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1423442730 is an abundant number, since it is smaller than the sum of its proper divisors (2057281494).

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

1423442730 is a wasteful number, since it uses less digits than its factorization.

1423442730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895310.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 1423442730 is about 37728.5399929549. The cubic root of 1423442730 is about 1124.8984876306.

Adding to 1423442730 its reverse (372443241), we get a palindrome (1795885971).

It can be divided in two parts, 1423 and 442730, that added together give a triangular number (444153 = T₉₄₂).

The spelling of 1423442730 in words is "one billion, four hundred twenty-three million, four hundred forty-two thousand, seven hundred thirty".