1302420440 has 32 divisors (see below), whose sum is σ = 2933070480. Its totient is φ = 520501632.

The previous prime is 1302420419. The next prime is 1302420491. The reversal of 1302420440 is 440242031.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 32522 + ... + 60518.

Almost surely, 2^1302420440 is an apocalyptic number.

1302420440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1302420440 is an abundant number, since it is smaller than the sum of its proper divisors (1630650040).

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

1302420440 is a wasteful number, since it uses less digits than its factorization.

1302420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29171 (or 29167 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1302420440 is about 36089.0626090510. The cubic root of 1302420440 is about 1092.0698095245.

Adding to 1302420440 its reverse (440242031), we get a palindrome (1742662471).

The spelling of 1302420440 in words is "one billion, three hundred two million, four hundred twenty thousand, four hundred forty".