1342636240 has 40 divisors (see below), whose sum is σ = 3405415968. Its totient is φ = 488231040.

The previous prime is 1342636237. The next prime is 1342636241. The reversal of 1342636240 is 426362431.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1342636240² = 3605344145922675200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1342636241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761982 + ... + 763741.

Almost surely, 2^1342636240 is an apocalyptic number.

1342636240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1342636240 is an abundant number, since it is smaller than the sum of its proper divisors (2062779728).

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

1342636240 is a wasteful number, since it uses less digits than its factorization.

1342636240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525747 (or 1525741 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 1342636240 is about 36642.0010370613. The cubic root of 1342636240 is about 1103.1962793062.

Adding to 1342636240 its reverse (426362431), we get a palindrome (1768998671).

The spelling of 1342636240 in words is "one billion, three hundred forty-two million, six hundred thirty-six thousand, two hundred forty".