1400644450 has 48 divisors (see below), whose sum is σ = 2765180160. Its totient is φ = 526014720.

The previous prime is 1400644439. The next prime is 1400644459. The reversal of 1400644450 is 544460041.

It is a super-3 number, since 3×1400644450³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1400644459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 391771 + ... + 395329.

It is an arithmetic number, because the mean of its divisors is an integer number (57607920).

Almost surely, 2^1400644450 is an apocalyptic number.

1400644450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1400644450 is a deficient number, since it is larger than the sum of its proper divisors (1364535710).

1400644450 is a wasteful number, since it uses less digits than its factorization.

1400644450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051 (or 4046 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1400644450 is about 37425.1847022830. The cubic root of 1400644450 is about 1118.8605679137.

The spelling of 1400644450 in words is "one billion, four hundred million, six hundred forty-four thousand, four hundred fifty".